Search Strains

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

Million Mutation Project strain. This strain was isolated after EMS+ENU mutagenesis of VC2010, propagated clonally through F10 to drive mutations to homozygosity, and subjected to whole-genome sequencing. It is homozygous for a large number of mutations determined from sequence data. It may also carry large copy number variations that are not homozygous. Alleles numbered between gk100000 and gk962522 are homozygous; those numbered from gk962523 up should be assumed to be non-homozygous. A graphical representation of these large copy number differences can be seen in the Plot section for each strain on the MMP web site ( http://genome.sfu.ca/mmp/). Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00042537

yfSi1 [nspf-1p::nspf-1::6xHis::tbb-2 3' UTR + loxP, II:8420157]. C-terminal 6xHis-tagged NSPF-1 allows visualization of NSPF seminal fluid protein localization in males and hermaphrodites. Transgene inserted into ttTi5650 MosSCI site (II:8420157) using CRISPR/Cas9. Reference: Kasimatis KR, et al. (2022) No evidence of sexual conflict for a novel sperm-derived seminal fluid protein in Caenorhabditis nematodes. bioRxiv doi: https://doi.org/10.1101/2022.09.22.509081

pkIs2170 [hsp-16.41::ATG-LacZ(first 251nt)-I-Sce-I site-stops-LacZ + unc-119(+)]. pkIs2379 [hsp-16.41::I-Sce-I ORF + rol-6(su1006)]. Reference: Pontier DB &Tijsterman M. Nat Methods. 2009 Sep;6(9):655-7.

qxIs257 [ced-1p::nuc-1::mCherry + unc-76(+)]. Integrated nuc-1::mCherry transgene marking lysosomes in epidermal cells. Site of chromosomal integration unknown. Not known if unc-76(e911) is still present in background. Reference: Li Y, et al. J Cell Biol. 2016 Oct 24;215(2):167-185.

Y37E3.10. qd338 disrupts Ser49 phosphorylation site; suppresses daf-28(sa191) constitutive dauer entry phenotype. Reference: Kulalert W, et al. Genetics 2017. In press.

fjSi1 [2×FLAG::csr-1 + Cbr-unc-119(+)] II. Single-copy insertion in the MosSCI locus ttTi5605 (LG II). The 2×FLAG::csr-1 transgene was designed to express proteins with a double FLAG tag instead of the N169 of CSR-1a and N6 of CSR-1b. The linker sequence between the two FLAG tags has a NotI site. The insertion can be checked by PCR with the following primers: CACACTCGATTCTACGCCAA (at the 3'-side of csr-1) and ATCGGGAGGCGAACCTAACTG (near ttTi5605 on LG II). Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

fjSi3 [HA_2×FLAG::C04F12.1 + Cbr-unc-119(+)] II. Single-copy insertion in the MosSCI locus ttTi5605 (LG II). The HA_2×FLAG::C04F12.1 transgene was designed to express a protein with an HA tag and a double FLAG tag inserted after S21 of C04F12.1. The linker sequence between the HA tag and the double FLAG tag has a NotI site. The insertion can be checked by PCR with the following primers: GGAGCCGATTTGTTCCAGTC (at the 3'-side of C04F12.1) and ATCGGGAGGCGAACCTAACTG (near ttTi5605 on LG II). vsra-1 is also known as csr-2/C04F12.1. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP csr-1(fj67) homozygotes (sterile, but some animals lay a small number of dead eggs). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Intracellular localization of CSR-1 is abnormal in the csr-1(fj67) homozygotes. fj67 is a 60-bp in-frame deletion of the first lysine-rich region (KQKDNFILLDILLKQWAAKK) in CSR-1. The first lysine-rich region in the WT has a FokI site. The deletion can be checked by PCR with the following primers: CACCTGTGATTTTTCGGGGAAC and TGGATTCCTTTTGCTGCAACAG, followed by digestion with FokI. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP csr-1(fj70) homozygotes (sterile, but some animals lay a small number of dead eggs). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. fj70 is a D769L mutation that renders CSR-1 (an Argonaute protein) catalytically defective and generates a new SphI site. The fj70 mutation can be checked by PCR with the following primers: TACACGTGGATGATGAGAAG and TCGTCCGAAACTTCCTCATC, followed by digestion with SphI. Homozygous nT1[qIs51] inviable. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

Four amino-acid residues (G24–V27) near the N-terminus of EGO-1 were replaced with a PA-tag sequence (GVAMPGAEDDVV derived from human podoplanin) in the endogenous ego-1 gene. The PA-tag insertion can be checked by PCR with the following primers: TTCAAAATGCCGCTGCCTTC and GTCCTCTTCGCATCTTTATCAG, followed by digestion with Sau96I. The wild-type ego-1 gene contains a Sau96I site within its PCR region, while the PA-tagged ego-1 does not. This strain was used for immunofluorescence analysis of EGO-1. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

fjSi19 [rpl-21p::2×HA::C04F12.1 + Cbr-unc-119(+)] II. Single-copy insertion in the MosSCI locus ttTi5605 (LG II). The 2×HA::C04F12.1 transgene was designed to express a protein with a double HA tag at its N-terminus, using a strong ubiquitous promoter (rpl-21p). The linker sequence between the two HA tags has a NotI site. The insertion can be checked by PCR with the following primers: GGAGCCGATTTGTTCCAGTC (at the 3'-side of C04F12.1) and ATCGGGAGGCGAACCTAACTG (near ttTi5605 on LG II). vsra-1 is also known as csr-2/C04F12.1. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP csr-1(fj126) homozygotes (sterile, but some animals lay a small number of dead eggs). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. fj126 was generated by the insertion of a synthetic nuclear export signal (NES). Instead of six amino-acid residues (R8–I13) near the N-terminus of CSR-1b, an NES sequence (LNELALKLAGLDI) from the cAMP-dependent protein kinase inhibitor alpha in mammals was inserted into the endogenous csr-1 gene. The DNA sequence encoding the NES has a HindIII site. The fj126 mutation can be checked by PCR with the following primers: AAGAAATACCAATGCGGAGGCA and CCGCTGAGGAACGAGATGG, followed by digestion with HindIII. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

RNAi deficient (Rde). Him. Partially-inaccurate paring of meiotic chromosomes. fj150 is a mutation changing WK to FS and generating a new FspI site in the second K-rich region between the PAZ and Piwi domains. The fj150 mutation can be detected by PCR with the following primers: TCGGATGTTGACTACAACGC and GAAGGTAGAAACTTCATTCCAGCAC, followed by digestion with FspI. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

fj150 is a mutation changing WK to FS and generating a new FspI site in the second K-rich region between the PAZ and Piwi domains. fj150 is enhanced by the CeRep55 quadruple deletion. The fj150 mutation can be detected by PCR with the following primers: TCGGATGTTGACTACAACGC and GAAGGTAGAAACTTCATTCCAGCAC, followed by digestion with FspI. This strain lacks four major clusters of CeRep55 repeats on the X chromosome. The condensation of unpaired X chromosomes in male testes is insufficient. CeRep55 is a class of minisatellite sequences consisting of a 27-nt tandem repeat that is present on all chromosomes. Some CeRep55 clusters express long non-coding RNAs and small RNAs. Each of the four deletion sites was designed to acquire a sequence tag (TGTACAGGAAACAGCTATGACC; similar to M13 reverse) instead of the CeRep55 tandem repeats. The deletions of CeRep55 clusters can be checked by PCR with the following primers: fjDf1 in Y73B3A, AGTAGTTACAAAGCGATATACGAAC and TTCGCCGACTCATAGACATCTG; fjDf2 in Y75D11A, CAAGTGCCAAACTAGACTGCTC and TTCAAAACGCTACGCGATACCAG; fjDf3 in Y81B9A, AAATGCCCCTATCTCACAGTGG and GACTGCTAGAATCTGACTCGTC; fjDf4 in Y49A10A, CTCTTCCATTTCCAGTACAACCAG and GTTTCTATGGCTAGAGTCGTATGGTTAC. The PCR check can also be performed with the M13 reverse primer and the right-side primer. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

The CeRep55_X quadruple-deletion mutant does not exhibit a clear Him phenotype, but the Him phenotype of the him-1(e879) mutant is enhanced by the CeRep55_X quadruple deletions. CeRep55 quadruple deletion: fjDf1 (also known as fj115); fjDf2 (aka fj85); fjDf3 (aka fj123); fjDf4 (aka fj120) X. This strain lacks four major clusters of CeRep55 repeats on the X chromosome. The condensation of unpaired X chromosomes in male testes is insufficient. CeRep55 is a class of minisatellite sequences consisting of a 27-nt tandem repeat that is present on all chromosomes. Some CeRep55 clusters express long non-coding RNAs and small RNAs. Each of the four deletion sites was designed to acquire a sequence tag (TGTACAGGAAACAGCTATGACC; similar to M13 reverse) instead of the CeRep55 tandem repeats. The deletions of CeRep55 clusters can be checked by PCR with the following primers: fjDf1 in Y73B3A, AGTAGTTACAAAGCGATATACGAAC and TTCGCCGACTCATAGACATCTG; fjDf2 in Y75D11A, CAAGTGCCAAACTAGACTGCTC and TTCAAAACGCTACGCGATACCAG; fjDf3 in Y81B9A, AAATGCCCCTATCTCACAGTGG and GACTGCTAGAATCTGACTCGTC; fjDf4 in Y49A10A, CTCTTCCATTTCCAGTACAACCAG and GTTTCTATGGCTAGAGTCGTATGGTTAC. The PCR check can also be performed with the M13 reverse primer and the right-side primer. The e879 mutation can be checked by PCR with the following primers: AAATCAGGAGTGGGCATCAG and GGGAAGATTCCGATGAGTGA, followed by digestion with MvaI. The wild-type him-1 gene contains an MvaI site within its PCR region, while the e879 allele does not. Reference: Tabara H, et al. (2023) A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes. EMBO J, e105002.

zzyIs17 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] V. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 0 and 6.9 Mb on Chromosome V. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs25 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] V. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 3.5 and 8.45 Mb on Chromosome V. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs29 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] IV. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 1.28 and 9.85 Mb on Chromosome IV. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs31 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] IV. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 1.5 and 9.85 Mb on Chromosome IV. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs34 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] X. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 0 and 2.37 Mb on Chromosome X. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs37 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] IV. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 0 and 15.35 Mb on Chromosome IV. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs43 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] IV. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 0 and 9.85 Mb on Chromosome IV. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs49 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] IV. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 0 and 9.85 Mb on Chromosome IV. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs64 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] X. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 9.74 and 21.54 Mb on Chromosome X. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

zzyIs66 [Cbr-myo-2p::GFP + Cbr-unc-119(+)] V. Transgene inserted into RW20000 Cbr-unc-119. Insertion site is between 7.75 and 17.07 Mb on Chromosome V. Reference: Bi Y, et al. PLoS Genet. 2015 Feb 18;11(2):e1004993.

CRISPR allele of endogenous let-23, which expresses let-23::GFP fusion protein and is susceptible for conditional knock-out via incorporated FRT sites with FLPase expression. Reference: Konietzka et al. 2019. Current Biology (accepted).

bafIs63 [lin-42p(mut)::GFP + unc-119(+)]. lin-42p(mut)::GFP reporter consists of 2 kb upstream of lin-42a isoform subcloned into modified pPD95.75 vector also carrying unc-119(+); all potential DAF-12 binding sites have been mutated. Reference: Hochbaum D, et al. PLoS Genet. 2011 Jul;7(7):e1002179.

Bacteria. CeMbio Collection. Natural isolate from a C. elegans natural habitat (rotting Petasites stem). LB, 20-26C. Sampled in: Ivry, France. More information about collection on the project's wiki: http://www.cembio.uni-kiel.de/. 16S rRNA primer: 27F/1492R. 16S rRNA sequence: TGGAGCTTGCTCCTTGGGTGACGAGTGGCGGACGGGTGAGTAATGTCTGGGAAACTGCCC GATGGAGGGGGATAACTACTGGAAACGGTAGCTAATACCGCATAACGTCGCAAGACCAAAGT GGGGGACCTTCGGGCCTCACACCATCGGATGTGCCCAGATGGGATTAGCTAGTAGGTGGG GTAATGGCTCACCTAGGCGACGATCCCTAGCTGGTCTGAGAGGATGACCAGCCACACTGGA ACTGAGACACGGTCCAGACTCCTACGGGAGGCAGCAGTGGGGAATATTGCACAATGGGCG CAAGCCTGATGCAGCCATGCCGCGTGTATGAAGAAGGCCTTCGGGTTGTAAAGTACTTTCA GCGGGGAGGAAGGCGGTGAGGTTAATAACCTCACCGATTGACGTTACCCGCAGAAGAAGCA CCGGCTAACTCCGTGCCAGCAGCCGCGGTAATACGGAGGGTGCAAGCGTTAATCGNAATTA CTGGGCGTAAAGCGCACGCCGGCGGTCTGTCAAGTCGGATGTGAATCCCCGGGCTTAAC CTGGGAACTGCATTCGAAACTGGCAGGCTAGAGTCTCGTAGAGGGGGGTAGAATTCCAGGT GTAGCGGTGAAATGCGTAGAGATCTGGAGGAATACCGGTGGCGAAGGCGGCCCCCTGGAC GAAGACTGACGCTCAGGTGCGAAAGCGTGGGGAGCAAACAGGATTAGATACCCTGGTAGTC CACGCCGTAAACGATGTCGACTTGGAGGTTGTTCCCTTGAGGAGTGGCTTCCGGAGCTAA CGCGTTAAGTCGACCGCCTGGGGAGTACGGCCGCAAGGTTAAAACTCAAATGAATTGACGG GGGCCCGCACAAGCGGTGGAGCATGTGGTTTAATTCGATGCAACGCGAAGAACCTTACCTA CTCTTGACATCCAGCGAACTTAGCAGAGATGCCCTGGTGCCTTCGGGAACCCTGAGACAG GTGCTGCATGGCTGTCGTCAGCTCGTGTTGTGAAATGTTGGGTTAAGTCCCGCAACGAGC GCAACCCTTATCCTTTGTTGCCAGCGGTCCGGCCGGGAACTCAAAGGAGACTGCCAGTGA TAAACTGGAGGAAGGTGGGGATGACGTCAAGTCATCATGGCCCTTACGAGTAGGGCTACACA CGTGCTACAATGGCGCATACAAAGAGAAGCGACCTCGCGAGAGCAAGCGGACCTCATAAAG TGCGTCGTAGTCCGGATCGGAGTCTGCAACTCGACTCCGTGAAGTCGGAATCGCTAGTAAT CGTAGATCAGAATGCTACGGTGAATACGTTCCCGGGCCTTGTACACACCGCCCGTCACACC ATGGGAGTGGGTTGCAAAAGAAGTAGGTAGCTTAAC

bqSi189 [lmn-1p::mCherry::his-58 + unc-119(+)] II. Cassette for GFP-labeling and FLP-mediated inactivation of endogenous npp-2 inserted by CRISPR/Cas9 after the npp-2 start codon. FRT sites in GFP introns 2 & 3. Ubiquitous expression of mCh::HIS-58. Might carry unc-119(ed3) III. Reference: Fragoso-Luna A, et al. 2021 bioRxiv 2021.12.21.473632; doi: https://doi.org/10.1101/2021.12.21.473632

bqSi1030 [hsp16.41p::FRT::mCherry::his-58::FRT::vhhGFP4::zif-1 + unc-119(+)] II. bqSi548 [dpy-7p::FLP + unc-119(+)] IV. Can be used for conditional depletion of GFP-tagged proteins in the hypodermis via anti-GFP nanobody fusion to ZIF1 (mediated by recruited ZIF-1 but NOT requiring ZF1 tags). Mechanism features heat-shock inactive ZIF-1 with FRT sites flanking inactivating sequence and hypodermal-specific expression of Cre to remove inactivating sequences to free vhhGFP4::zif-1 GFP degradation. May carry unc-119(ed3) III. Reference: Fragoso-Luna A, et al. 2021 bioRxiv 2021.12.21.473632; doi: https://doi.org/10.1101/2021.12.21.473632

bqSi1030 [hsp16.41p::FRT::mCherry::his-58::FRT::vhhGFP4::zif-1 + unc-119(+)] II. bqSi508 [elt-2p::FLP + unc-119(+)] IV. Can be used for conditional depletion of GFP-tagged proteins in the intestine via anti-GFP nanobody fusion to ZIF1 (mediated by recruited ZIF-1 but NOT requiring ZF1 tags). Mechanism features heat-shock inactive ZIF-1 with FRT sites flanking inactivating sequence and intestinal-specific expression of Cre to remove inactivating sequences to free vhhGFP4::zif-1 GFP degradation. May carry unc-119(ed3) III. Reference: Fragoso-Luna A, et al. 2021 bioRxiv 2021.12.21.473632; doi: https://doi.org/10.1101/2021.12.21.473632

bqSi577 [myo-2p::GFP + unc-119(+)] IV. Cassette for GFP-labeling and FLP-mediated inactivation of endogenous baf-1 inserted by CRISPR/Cas9 after the baf-1 start codon. FRT sites in GFP intron 3 and baf-1 3'UTR are indicated by ">" symbols in genotype. Reference: Fragoso-Luna A, et al. 2021 bioRxiv 2021.12.21.473632; doi: https://doi.org/10.1101/2021.12.21.473632

GFP cassette for labeling and FLP-mediated inactivation of baf-1 inserted by CRISPR/Cas9 after the baf-1 start codon. FRT sites in GFP introns 2 & 3.

bqSi189 [lmn-1p::mCherry::his-58 + unc-119(+)] II. Cassette for GFP-labeling and FLP-mediated inactivation of endogenous mel-28 inserted by CRISPR/Cas9 after the npp-248 start codon. FRT sites in GFP introns 1 & 2 enable FLP-mediated conditional knockout; in the absence of FLP, the construct behaves as normal GFP. bqSi189 is a single-copy MosSCI insertion into ttTi5605. Reference: Thomas L, et al. bioRxiv 2022.08.22.504855; doi: https://doi.org/10.1101/2022.08.22.504855

bqSi189 [lmn-1p::mCherry::his-58 + unc-119(+)] II. Cassette for GFP-labeling and FLP-mediated inactivation of endogenous mel-28 inserted by CRISPR/Cas9 after the mel-28 start codon. FRT sites in GFP introns 2 & 3. Ubiquitous expression of mCherry::HIS-58. Reference: Fragoso-Luna A, et al. 2021 bioRxiv 2021.12.21.473632; doi: https://doi.org/10.1101/2021.12.21.473632

Missense mutations D1135L and S1136W, G1218K and E1219Q, and R1335Q and T1337R were introduced on the Cas9 gene at EG9615 strain, to cause endogenous expression of the Cas9 variant SpG. SpG is efficient for CRISPR on NGN PAM sites. Reference: Vicencio J, et al. Nature Communication, 2022. May 12;13(1):2601. doi: 10.1038/s41467-022-30228-4.

Isolated in 1991 by Carlos E. Winter in soil samples taken at the University of Sao Paulo in Brazil. Hermaphrodite strain. Adults are smaller than C. elegans. The life cycle is a little longer than C. elegans at 22C. Each lays about 300 eggs in the three days following the moult from L4 to adult. Eggs are laid just after being fertilized resulting sometimes in plates with many eggs (much more than C. elegans). See Comp. Biochem. Physiol 103B: 189, 1992. See Nematology 2(1): 89-98, 2000. Can be grown and maintained on NGM. L1s easily frozen and stored in liquid nitrogen. This strain is deposited in Paul Sternberg's collection under the name PS1022. The species has not yet been determined; Lynn Carta will publish a paper proposing Oscheius brevesophaga. DO NOT use this name before the paper is published. Contact Carles E. Winter or Lynn Carta before publishing anything official about this strain. See also WBPaper00004471 and WBPaper00004485. AKA Oscheius sp. 1.

kstSi60 [LoxP + Cbr-unc-119(+) + LoxP + mlc-2p::GFP(kst32)] II. N2-like, no MLC-2::GFP fluorescence. mlc-2p::GFP(kst32) is a partial, non-functional GFP reporter used for section in MosTI, an updated technique for targeted single-copy and extra-chromosomal array insertion. Cbr-unc-119(+) is flanked by LoxP sites, facilitating removal by recombination. Reference: El Mouridi S, et al. 2022.

kstSi61 [LoxP + Cbr-unc-119(+) + LoxP + hygroR(kst31)] II. N2-like, no hygromycin resistance (HygroR). hygroR(kst31) is a partial, non-functional hygromycin-resistance construct used for section in MosTI, an updated technique for targeted single-copy and extra-chromosomal array insertion. Cbr-unc-119(+) is flanked by LoxP sites, facilitating removal by recombination. Reference: El Mouridi S, et al. 2022.

kstSi84 [LoxP + Cbr-unc-119(+) + LoxP + mlc-2p::GFP(kst32)] I. N2-like, no MLC-2::GFP fluorescence. mlc-2p::GFP(kst32) is a partial, non-functional GFP reporter used for section in MosTI, an updated technique for targeted single-copy and extra-chromosomal array insertion. Cbr-unc-119(+) is flanked by LoxP sites, facilitating removal by recombination. Reference: El Mouridi S, et al. 2022.

olaEx987 [ttx-3p::mCherry::rab-3 + hlh-17p::CD4::GFP1-10 + ttx-3p::CD4::GFP11 + unc-122p::GFP]. Maintain by picking animals with GFP expression in coelomocytes. olaEx987 labels AIY presynaptic sites with mCherry, and AIY and CEPsh contact with GFP. oleEx987 contains GRASP (GFP Reconstitution Across Synaptic Partners) constructs using two GFP fragments, GFP1-10 and GFP11, that can reconstitute a functional GFP molecule only when they are in close proximity. Reference: Shao Z, et al. Cell. 2013 Jul 18;154(2):337-50.

olaEx1316 [ttx-3p::CD4::GFP11 + glr-3p::CD4::GFP1-10 + ttx-3p::mCherry::rab-3 + unc-122p::GFP]. Maintain by picking animals with GFP expression in coelomocytes. olaEx1316 labels AIY presynaptic sites with mCherry, and AIY and RIA contact with GFP. oleEx1316 contains GRASP (GFP Reconstitution Across Synaptic Partners) constructs using two GFP fragments, GFP1-10 and GFP11, that can reconstitute a functional GFP molecule only when they are in close proximity. Reference: Shao Z, et al. Cell. 2013 Jul 18;154(2):337-50.

For PCR STS mapping. Differs from RW7000 in two Tc1 sites. Caenorhabditis elegans wild isolate. DP subclone of RW7000. For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

Bacteria. E. coli HT115(DE3) bacterial strain carrying pGC8. pGC8 is a partial cDNA of him-14 (ZK1127.11) cloned into the Timmons and Fire "double T-7 vector" L4440. The source of the cDNA is Yuji Kohara's clone yk240h12. pGC8 was constructed by inserting the 1.65kb KpnI/SacI fragment of the him-14 cDNA (from base pair 1071 to 192 base pairs beyond the stop codon) into the same sites in L4440. HT115(DE3) carrying pGC8 should be selected in the presence of 50 um/ml tetracyline and 100 um/ml ampicillin. Prior to an actual feeding experiment, it can be grown in liquid in the presence of amp alone (no tet) and then seeded onto NGM plates containing amp and 1 mM IPTG. This technique does not work well if the cells are old; therefore, the strain should be seeded onto IPTG-containing plates from a fresh overnight that was grown from a colony on an amp/tet plate. Biosafety Level: BSL-1. For more info see http://www.wormbook.org/wli/wbg17.1p32/

arSi159 [rps-27p::GFP(LoxP-flexon-LoxP)::H2B::unc-54 3'UTR + Cbr-unc-119(+)] II. Inserted into ttTi5605 (II). The first intron of GFP was replaced with a Flexon containing two loxP sites. High level GFP::H2B expression requires Cre expression from a second transgene. Reference: Wittes J & Greenwald I. (2024). New Flexon-based reagents for tissue-specific Auxin-Inducible Degradation and for characterizing Cre and Flp drivers in C. elegans. microPublication Biology. 10.17912/micropub.biology.001315.