Search Strains

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP, arrested nT1[qIs51] aneuploids, and non-GFP iow1 homozygotes (viable; see note below). Homozygous nT1[qIs51] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. iow1 is a separation-of-function allele of mre-11. Homozygotes develop into adults wild-type in appearance, but laying dead eggs due to defects in meiotic DSB repair: mre-11(iow1) worms form meiotic DSBs but are impaired in their resection. Pick GFP+ to maintain (mre-11(iow1)/nT1[qIs51]) and GFP- to obtain homozygous mre-11(iow1) worms for analysis. Reference: Yin Y & Smolikove S. Mol Cell Biol. 2013 Jul;33(14):2732-47. doi: 10.1128/MCB.00055-13. Epub 2013 May 13. Erratum in: Mol Cell Biol. 2015 Jul;35(14):2568. PubMed PMID: 23671188; PubMed Central PMCID: PMC3700128.

Heterozygotes are wild-type with pharyngeal-expressed GFP, and segregate wild-type GFP+(pharynx) heterozygotes, arrested nT1[qIs51] homozygotes, and viable non-GFP(pharynx) rad-51(iow53[GFP::rad-51]) homozygotes. Balancer is prone to breaking down. If a population contains a mix of bright and dim GFP animals, pick dim GFP and check for correct segregation of progeny to maintain. iow53 inserted a GFP tag at the N-terminus of the endogenous rad-51 locus, but the tagged protein is not fully functional. non-GFP(pharynx) rad-51(iow53[GFP::rad-51]) homozygotes form GFP foci in the germline that are mostly spo-11 dependent, and GFP::rad-51 homozygotes have defects in unloading RAD-51. Created by CRISPR using pDD282, therefore may also contain 3XFLAG. Reference: Koury E, et al. Nucleic Acids Res. 2018 Jan 25;46(2):748-764.

Homozygous gfp and 3xflag C’ terminal tag inserting just before the STOP codon of mre-11. The strain is fertile and contains wild type germline (examined by DAPI). GFP is expressed in all germline nuclei. Maintain the strain by picking worms at 20C, no selection required. gfp::3xflag was added by CRISPR/Cas9 using pDD282-based vector. Reference: Reichman R, et al. Genetics. 2018 Apr;208(4):1421-1441.

Homozygous sterile double mutant balanced by bli-4- and GFP-marked translocation. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP heterozygotes, arrested hT2 aneuploids, and non-GFP ok1627 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. rpa-4(iow24) deletion generated by CRISPR/Cas9 in the rpa-2(ok1627) mutant background. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

N-terminal 3xFLAG tag inserted into the endogenous rpa-4 locus using Crispr/Cas9. Homozygous sterile deletion balanced by bli-4- and GFP-marked translocation. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP heterozygotes, arrested hT2 aneuploids, and non-GFP ok1627 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. Generated in rpa-2(ok1627) background. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

Heterozygotes are wild-type with pharyngeal-expressed GFP, and segregate wild-type GFP+(pharynx) heterozygotes, arrested nT1[qIs51] homozygotes, and viable non-GFP(pharynx) ubc-9(iow97[3xFLAG::ubc-9]) homozygotes. Maintain the strain by picking wild-type GFP+ worms and checking for correct segregation of progeny. iow97 was created by CRISPR/Cas9 insertion of a 3xflag tag at the N-terminus of the endogenous ubc-9 locus; however, the tagged protein is not fully functional. SSM491 is a replacement for SSM291: analysis shows that in all parameters tested, SSM491 is identical to SSM291, which was genetically unstable and prone to breaking down. Reference: Reichman R, et al. Genetics. 2018 Apr;208(4):1421-1441.

Crispr/Cas9-engineered indel in the 5’ region of rpa-1. Larval-lethal mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are wild-type with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP iow117 homozygotes (larval lethal). Pick wild-type dim GFP and check for correct segregation of progeny to maintain. iow117 was generated in mre-11::GFP background and outcrossed to N2. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

ncIs2 [pH20::GFP + pBlueScript]. Expresses GFP in nearly all neurons. No morphological or behavioral phenotypes.

ncIs3 [pH20::GFP + pBlueScript]. Expresses GFP in nearly all neurons. No morphological or behavioral phenotypes.

Reduced brood size. Reduced phosphorylation level of eIF2alpa. Isolated as a suppressor of the ray1 phenotype of plx-1.

ncIs17 contains [hsp-16.2::eGFP + pBluscript]. Superficially wild-type.

hrtIs3 [des-2p::myr::GFP + unc-122p::DsRed]. hrtEx52 [des-2p::mKate::GS1(high) + unc-119(+) + myo-2p::tdTomato]. Pick tdTomato+ animals to maintain. Myristylated GFP marker for PVD. PVD development is quite strongly affected by high levels of actin-perturbing DeAct-GS1 expression in PVD and FLP. Phenotype is more severe than that of the low DeAct-GS1 expressing strain STR199, but weaker than that of the DeAct-SpvB expressing strain STR200. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

wdIs51 [F49H12.4::GFP + unc-119(+)]; likely integrated in X. hrtEx53 [des-2p::mKate::GS1(low) + unc-119(+) + myo-2p::tdTomato]. Pick tdTomato+ animals to maintain. PVD development is somewhat affected by moderate levels of actin-perturbing DeAct-GS1 expression in PVD and FLP. Phenotype is less severe than that of the high DeAct-GS1 expressing strain STR198 and DeAct-SpvB expressing strain STR200. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

hrtIs3 [des-2p::myr::GFP + unc-122p::DsRed]. hrtEx54 [des-2p::mKate::SpvB + unc-119(+) + lin-48p::tdTomato]. Pick animals with tdTomato expression in the tail to maintain. Myristylated GFP marker for PVD. PVD development is severely affected by low levels of actin-perturbing DeAct-SpvB expression in PVD and FLP. Phenotype is more severe than that of DeAct-GS1 expressing strains STR198 and STR199. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

hrtIs3 [des-2p::myr::GFP + unc-122p::DsRed]. Myristylated GFP marker for PVD. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

jcEx44 [ajm-1::GFP + rol-6(su1006)]. Throws Rollers (weak -- some animals appear nearly wild-type) expressing ajm-1::GFP and dead eggs.

Superficially wild-type. Derived by outcrossing RB820 eight times to N2. Reference: Maia, A.F. et al. 2015 Sci Data 2:150020.

heEx526 [myo-2p::GFP]. Superficially wild-type. Pick GFP+ to maintain. Derived by crossing SV1005 and SV1069. Reference: Maia, A.F. et al. 2015 Sci Data 2:150020.

he278 is a CRISPR-induced deletion of ebp-2. he279 is a deletion removing ebp-1, Y59A8B.25 & ebp-3. Low penetrance of pleiotropic phenotypes among adults, including low frequency of dumpy, sterile and/or uncoordinated animals and nonviable larvae that explode through the vulva. Some adults develop irregularities that seem to represent epidermal bulges. Reference: Schmidt et al., J Cell Biol. 2017 Sep 4; 216(9): 2777–2793. doi: 10.1083/jcb.201607038

eGFP and 3xFlag tags inserted into endogenous rnt-1 locus. Superficially wild-type. Reference: Horst SEM, et al. Development 2019 Nov 18;146(22):dev180034.

he314[pie-1p::GLO-ePDZ::mCherry::smu-1::tbb-2 3'UTR] II. e259[eft-3p::PH::eGFP::LOV::tbb-2 3'UTR]) IV. Superficially wild-type. CRISPR/Cas9 was used to create insertion alleles he314 and he259 insertions into N2 background at sites of known MosSCI insertions ttTi5605 and cxTi10816, respectively. ePDZ–LOV system transgenes allow use of blue light to control protein heterodimerization, in this case, membrane recruitment of ePDZ-tagged proteins of interest. Germline-optimized cytosolic ePDZ::mCherry-tagged SMU-1 (GLO-ePDZ::mCherry::SMU-1), and membrane-bound LOV2 domain fused to a pleckstrin-homology domain (PH::eGFP::LOV). GLO-ePDZ::mCherry is a germline-optimized variant coded to be less prone to silencing in the germline. Reference: Fielmich LE, et al. eLife 2018 Aug 15;7:e38198. doi: 10.7554/eLife.38198.

mjIs144 [mex-5p::GFP::his-58::21UR-1target::tbb-2 3'UTR + unc-119(+)] II. piRNA sensor strain. Single copy inserted into ttTi5605 (MosSCI). Superficially wild-type with loss of piRNA sensor silencing in piRNA pathway mutants (e.g. prg-1). GFP is silenced in wild-type, expressed in piRNA pathway mutants and can be used as a simple read-out for piRNA pathway function. Reference: Bagijn MP, et al. Science. 2012 Aug 3;337(6094):574-8.

mjIs588 [mex-5p::GFP::his-58::21UR-1target::tbb-2 3'UTR + unc-119(+)] II. mjIs588 was derived by removing introns 2 and 3 from the construct used to generate the mjIs144 transgene. Single copy inserted into ttTi5605 (MosSCI). Superficially wild-type. mjIs588 GFP is silenced in wild-type animals and de-silenced in hrde-1 mutant animals. Reference: Akay A, et al. Dev Cell. 2017 Aug 7;42(3):241-255.e6.

mjSi92[OLLAS::emb-4]. Endogenous emb-4 locus tagged with OLLAS epitope. No visible phenotype. Reference: Akay A, et al. Dev Cell. 2017 Aug 7;42(3):241-255.e6.

ccEx7271 [let-858::GFP + pha-1(+)]. This strain expresses nuclear-localized GFP in all somatic nuclei, but reduced or no GFP in germ cells. If maintained at 20C, pha-1(ts) genotype will select for transgenic animals. Germ cell expression can be observed when maintained at 25C. Germline transgene silencing is abnormal.

snrp-27(az56) is a M141T missense allele with semi-dominant suppression of e936. No phenotype on its own. az56 is a CRISPR-induced mutation mimicking a known suppressor of unc-73(e936). This allele activates many dozens of alternative 5' splice sites in an RNA-seq experiment. snrp-27 is a component of the tri-snRNP and pre-B spliceosomal complexes. Reference: Zahler AM, et al. RNA. 2018 Oct;24(10):1314-1325. doi: 10.1261/rna.066878.118. PMID: 30006499.

CRISPR/Cas9 engineered smg-4 null allele. smg-4(az152) allele is confirmed NMD-defective by both the presence of the protruding vulva phenotype and the accumulation of NMD-targeted isoforms. smg-4(az152) is easy to track in crosses by PCR and digestion with BstBI (see S1 text of Suzuki, et al. for sequence of allele) and essentially mimics ma116 in having a G->A mutation at the last base of intron 1. az152 also removes two bases of exon 2 and inserts 50nt in exon 2. Reference: Suzuki JMNGL, et al. PLoS Genet. 2022 Feb 10;18(2):e1010028. doi: 10.1371/journal.pgen.1010028. PMID: 35143478.

dxbp-1(az121) is a K23N mutation that promotes usage of introns starting in UU when the sequence GUU is present at the 5' end of the intron. az121 was initially identified as able to suppress uncoordination of unc-73(e936) by promoting a cryptic splice site that defines an intron beginning UU. smg-4 mutant background allows for high throughput sequencing to identify frame shifted transcripts since it can move the 5'ss over by 1nt. e936az30 has no phenotype on its own, but it offers two adjacent cryptic 5'ss separated by 1nt. Reference: Suzuki JMNGL, et al. PLoS Genet. 2022 Feb 10;18(2):e1010028. doi: 10.1371/journal.pgen.1010028. PMID: 35143478.

az52 is a CRISPR-engineered M107I missense allele of dxbp-1. az52 has no phenotype on its own, but suppresses unc-73(e936) and unc-73(az63) by promoting use of a cryptic splice site for an intron beginning with UU. smg-4(az152) provides an NMD deficient background allowing identification of out-of-frame mis-splicing in an RNA-seq experiment. Reference: Suzuki JMNGL, et al. PLoS Genet. 2022 Feb 10;18(2):e1010028. doi: 10.1371/journal.pgen.1010028. PMID: 35143478.

SNU-66 H765G substitution. No obvious morphological or growth phenotypes were observed. az160 mutation disrupts SNU-66(H765)/SNRP-27(M141) interaction, affecting alternative 5' splice site usage. Worm SNU-66(H765) and SNRP-27(M141) are homologous to human preB spliceosome components snu66(H734) and snrnp27(M141), respectively. Reference: Sarka K, et al. 2024. In submission.

Directed mutagenesis of mog-5 removed 17 amino acids and inserted 9 different amino acids at the site of structural interface with SACY-1, promoting upstream alternative 3'ss usage in somatic cells in a pattern similar to sacy-1 mutants and similar to a switch that occurs in the germline. Changes alternative 3' splice site usage to upstream 3' splice site in somatic cells for 76 different alternative splicing events. No obvious morphological phenotypes. Reference: Osterhoudt K, et al. RNA. 2024 Jan 24:rna.079888.123. doi: 10.1261/rna.079888.123. PMID: 38282418.

Superficially wild-type. Deletion site verified by PCR. Reference: Meier B, et al. Genome Res. 2014 Oct;24(10):1624-36.

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Segregates WT GFP+ heterozygotes, non-GFP mus-81; xpf-1 double homozygotes, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+ to retain balanced strain: 15-25% of mus-81; xpf-1 double homozygotes are viable. unc-119(ed3) has likely been lost through outcrossing, but could still be present in the background. Reference: Agostinho A, et al. PLos Genetics 2013.

Segregates WT GFP+ heterozygotes, non-GFP slx-1; xpf-1 double homozygotes, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+ to retain balanced strain: 15-25% of slx-1 xpf-1 double homozygotes are viable. Reference: Agostinho A, et al. PLos Genetics 2013.

Superficially wild-type. Deletion site verified by PCR. Reference: Meier B, et al. Genome Res. 2014 Oct;24(10):1624-36.

Superficially wild-type. Deletion site verified by PCR. Reference: Muzzini DM, et al. DNA Repair (Amst.) 2008 Jun 1;7(6):941-50.

vtIs1 [dat-1p::GFP + rol-6(su1006)] V. Rollers. [NOTE: tsp-17(tm4995) is the correct allele carried in this strain. The genotype was annotated incorrectly in Masoudi N, et al. (S. Mitani, 11/2016)] Reference: Masoudi N, et al. PLoS Genet. 2014 Dec 4;10(12):e1004767.

gtIs2512 [pie-1p::his-11::GFP + unc-119(+)]. Segregates WT GFP+ heterozygotes, non-GFP mus-81; xpf-1 double homozygotes, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+ to retain balanced strain: 15-25% of mus-81; xpf-1 double homozygotes are viable. unc-119(ed3) has likely been lost through outcrossing, but could still be present in the background. Reference: Agostinho A, et al. PLos Genetics 2013.

gtIs2512 [pie-1p::his-11::GFP + unc-119(+)]. Segregates WT GFP+ heterozygotes, non-GFP slx-1; xpf-1 double homozygotes, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+ to retain balanced strain: 15-25% of slx-1; xpf-1 double homozygotes are viable. unc-119(ed3) has likely been lost through outcrossing, but could still be present in the background. Reference: Agostinho A, et al. PLos Genetics 2013.

Superficially wild-type. Deletion site verified by PCR. Reference: Taylor MRG, et al. Cell. 2015 Jul 16;162(2):271-286.

Superficially wild-type. Deletion site verified by PCR. Reference: Meier B, et al. Genome Res. 2018 May;28(5):666-675.

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Superficially wild-type. Deletion site verified by PCR. Mos transposon insertion into apn-1; insertion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.

Y54G9A.6. Nonsense C to T transition. IR sensitive. To genotype: WT left mismatch primer: GAAACAGGCAACGGAACAC; mutant left mismatch primer: GAAACAGGCAACGGAAACT; right mismatch primer: CTCTTCATCATCTCCTCTCC. WT and mutant amplicon: 407 bp. Reference: Bertolini S, et al. G3 (Bethesda). 2017 Dec 4;7(12):3875-3885.

Superficially wild-type. Deletion site verified by PCR. Reference: Meier B, et al. 2020 bioRxiv, https://doi.org/10.1101/2020.06.04.133306

Superficially wild-type. Deletion site verified by PCR. Reference: Volkova NV, et al. Nat. Commun. 2020 May 1;11(1):2169.