Search Strains

Superficially wild-type. Seed mutation of mir-35 was made by two rounds of CRISPR/Cas9 editing. cdb2 is a 50 bp deletion of the mir-35 locus. cdb4 was created by successive homology-directed repair of the disrupted mir-35 locus with a protospacer to preserve the secondary structure of the primary and precursor hairpin. Reference: Yang B, et al. Genes Dev. 2020 Sep 1;34(17-18):1227-1238. PMID: 32820039

The seed region of the mature mir-35 is replaced with random nucleotides in mir-35(cdb2 cdb6). This mutant mir-35 has little impact on embryonic mir-35 abundance but strongly inhibits its decay at embryo to L1. Superficially wild-type. Reference: Donnelly BF, et al. (2022). Cell Reports.

cdb2 cdb72 is a mutation to the 3' end of the mature mir-35 creating a 3’ end containing nucleotides that are not present or rare among all mir-35 family members at a given position, while preserving overall GC content. This mir-35 mutant strongly impacts embryonic abundance of mir-35 but does not affect its decay at embryo to L1. Superficially wild-type. Reference: Donnelly BF, et al. (2022). Cell Reports.

cdb2 cdb78 is a mutation to the 3' end of the mature mir-35 creating a mutant with mir-35 seed sequence and mir-82 3’ end. This mir-35 mutant strongly impacts embryonic abundance of mir-35 but does not affect its decay at embryo to L1. Superficially wild-type. Reference: Donnelly BF, et al. (2022). Cell Reports.

Superficially wild type. Seed mutation of mir-35 was made by two rounds of CRISPR/Cas9 editing. cdb2 is a 50 bp deletion of the mir-35 locus. cdb4 was created by successive homology-directed repair of the disrupted mir-35 locus with a protospacer to preserve the secondary structure of the primary and precursor hairpin. egl-1(cdb97) contains engineered mutations in mir-35 binding site in the 3’UTR region making the sequence complementary to the mir-35(cdb4) variant. Reference: Yang B, et al. Genes Dev. 2020 Sep 1;34(17-18):1227-1238. PMID: 32820039

bcSi69 [hsp-16.41p::dCas9::SV40-NLS::HA::GS-linker::SV40-NLS::GFP::GFP::SV40-NLS::mai-2 3’UTR + Cbr-unc-119(+)] IV. [NOTE: MD4195 can be maintained at 20C instead of 15C because it does not carry an array with guide RNAs targeting essential genes.] Generated in parental strain EG8081. Reference: Memar N, et al. In vivo labeling of endogenous genomic loci in C. elegans using CRISPR/dCas9. MicroPubl Biol. 2022 Dec 13;2022:10.17912/micropub.biology.000701. doi: 10.17912/micropub.biology.000701. PMID: 36606081; PMCID: PMC9807462.

bcSi69 [hsp-16.41p::dCas9::SV40-NLS::HA::GS-linker::SV40-NLS::GFP::GFP::SV40-NLS::mai-2 3’UTR + Cbr-unc-119(+)] IV. bcEx1367 [U6p::rrn-4(sgRNAs1-4 targeting the rrn-4 locus) + rol-6(su1006)]. Maintain at 15C. Pick Rollers to maintain. After heat shock, distinct spots of GFP fluorescence are visible in the nucleus. bcEx1367 array contains a PCR product of 4 different guide RNAs targeting rrn-4 (around 100 repeats of rrn-4 on LG V). Reference: Memar N, et al. In vivo labeling of endogenous genomic loci in C. elegans using CRISPR/dCas9. MicroPubl Biol. 2022 Dec 13;2022:10.17912/micropub.biology.000701. doi: 10.17912/micropub.biology.000701. PMID: 36606081; PMCID: PMC9807462.

bcSi69 [hsp-16.41p::dCas9::SV40-NLS::HA::GS-linker::SV40-NLS::GFP::GFP::SV40-NLS::mai-2 3’UTR + Cbr-unc-119(+)] IV. bcEx1368 [U6p::rrn-1(sgRNAs1-4 targeting the rrn-1 locus) + rol-6(su1006)]. Maintain at 15C. Pick Rollers to maintain. After heat shock, distinct spots of GFP fluorescence are visible in the nucleus. bcEx1368 array contains a PCR product of 4 different guide RNAs targeting rrn-1 (around 100 repeats of rrn-1 on LG I). Reference: Memar N, et al. In vivo labeling of endogenous genomic loci in C. elegans using CRISPR/dCas9. MicroPubl Biol. 2022 Dec 13;2022:10.17912/micropub.biology.000701. doi: 10.17912/micropub.biology.000701. PMID: 36606081; PMCID: PMC9807462.

bcSi69 [hsp-16.41p::dCas9::SV40-NLS::HA::GS-linker::SV40-NLS::GFP::GFP::SV40-NLS::mai-2 3’UTR + Cbr-unc-119(+)] IV. bcEx1370 [U6p::rrn-4(sgRNAs1-4 targeting the rrn-1 locus) + U6p::rrn-4(sgRNAs1-4 targeting the rrn-4 locus) + rol-6(su1006)]. Maintain at 15C. Pick Rollers to maintain. After heat shock, distinct spots of GFP fluorescence are visible in the nucleus. bcEx1370 array contains a PCR product of 4 different guide RNAs targeting rrn-1 (around 100 repeats of rrn-1 on LG I) and a PCR product of 4 different guide RNAs targeting rrn-4 (around 100 repeats of rrn-4 on LG V). Reference: Memar N, et al. In vivo labeling of endogenous genomic loci in C. elegans using CRISPR/dCas9. MicroPubl Biol. 2022 Dec 13;2022:10.17912/micropub.biology.000701. doi: 10.17912/micropub.biology.000701. PMID: 36606081; PMCID: PMC9807462.

mNeonGreen tag inserted at C-terminus of endogenous ced-3 locus. Generated in N2 background. Reference: Lambie EJ, et al. Cell Death Differ. 2025 Aug 27. doi: 10.1038/s41418-025-01567-8. PMID: 40866673.

mNeonGreen tag inserted at C-terminus of endogenous ced-4 locus. Generated in N2 background. Reference: Lambie EJ, et al. Cell Death Differ. 2025 Aug 27. doi: 10.1038/s41418-025-01567-8. PMID: 40866673.

mNeonGreen tag inserted at N-terminus of endogenous ced-9 locus. Generated in N2 background. Reference: Lambie EJ, et al. Cell Death Differ. 2025 Aug 27. doi: 10.1038/s41418-025-01567-8. PMID: 40866673. .

bcIs39 [lim-7p::ced-1::GFP + lin-15(+)]. Expression of functional CED-1::GFP fusion protein in the sheath cells.

vtIs1 [dat-1p::GFP + rol-6(su1006)] V. muEx261 [ceh-20::GFP + odr-1::RFP]. Pick RFP+ animals to maintain. Rollers. Embryonic lethality of ceh-20(ok541); ceh-40(gk159) double mutants is rescued by muEx261.

vtIs1 [dat-1p::GFP + rol-6(su1006)] V. muEx261 [ceh-20::GFP at C terminus + odr-1::RFP(su1006)]. Pick RFP+ animals to maintain. Rollers. Embryonic lethality of ceh-20(mu290); ceh-40(gk159) double mutants is rescued by muEx261. ot406 has a dopaminergic phenotype.

vtIs1 [dat-1p::GFP + rol-6(su1006)] V. muEx261 [ceh-20::GFP + odr-1::RFP]. Pick RFP+ animals to maintain. Rollers. Embryonic lethality of ceh-20(mu290); ceh-40(gk159) double mutants is rescued by muEx261.

hmIs4 [des-2::GFP + rol-6(su1006)]. Rollers. Translational GFP fusion expressed on the membranes of PVD dendrites but not in the axon. Also expressed in m1 head muscles, IL2 neurons, FLP neurons and PVC neurons. Reference: Oren-Suissa M, et al. Science. 2010 Jun 4;328(5983):1285-8.

TI223.E1: AGACTTGAAGGAAACGCGAA. TI223.E2: AATCAAATTGAAACGGCTCG. TI223.I1: AATCCTTGCCAACCAAACAG. TI223.I2: CGTAGCATCCTTGGACCAGT. This strain was provided by the C. elegans Gene Knockout Project at OMRF, which is part of the International C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. http://www.mutantfactory.ouhsc.edu/

xsSi3 [GFP::utrophin + Cbr-unc-119(+)].  Superficially wild-type.  Carries a germline-expressed actin probe derived from the calponin homology domain of utrophin.  

xsSi5 [pie-1p::GFP::ani-1(AH+PH)::pie-1 3'UTR + Cbr-unc-119(+)] II. The RhoA biosensor consists of GFP fused to the C-terminal portion of C. elegans anillin, which contain its conserved region (AH) and pleckstrin homology (PH) domain. It lacks the N-terminal myosin- and actin-binding domains but retains its RhoA-binding domain. [NOTE: xsSi5 was originally published as mgSi5.] References: Tse YC, et al. Mol Biol Cell. 2012 Oct;23(20):4020-31.

xsSi36 [myo-2p::GFP(Y66C)::let-858 3'UTR + Cbr-unc-119(+) IV:13,048,924]. This strain contains a non-fluorescent GFP that can be used to enrich for CRISPR mediated, oligodirected homologous recombination. [NOTE: previously published as mgSi36.]  Reference: Zhang D & Glotzer M. 2014. Efficient site-specific editing of the C. elegans genome. doi: http://dx.doi.org/10.1101/007344.

ku194 is a loss of function allele, likely to be molecular null. Connection of gonad defective, >95% Egl. Anchor cell and uterine seam cell do not fuse. Males can mate. Hermaphrodites are very difficult to mate. Previously called cog-2(ku194).

Weak Vul phenotype. Suppressor of gain-of-function Ras. ku123 causes a C302Y substitution.

kuIs29 [egl-13p::GFP + unc-119(+)] V. egl-13 is the new gene name for cog-2. Transcriptional fusion of GFP to egl-13 gene. Nuclear localized. Bright expression in body wall muscles, expressed in uterine pi lineage, extensive neuronal expression. Note that a very low penetrance Cog phenotype is seen in this strain. Transgenes with egl-13 promoter can cause Cog phenotype. Conflicting map data: Wendy Hanna-Rose mapped kuIs129 to the left of dpy-11; Shi lab reported it close to gon-10 and unc-76.

kuIs34 [sem-4::GFP + unc-119(+)] IV. Superficially wild-type. Partial translational fusion reporter containing approximately half of SEM-4 fused in-frame to GFP. Reference: Lloret-Fernández et al. eLife 2018;7:e32785 DOI: 10.7554/eLife.32785. Grant K, et al. Dev Biol. 2000 Aug 15;224(2):496-506.

kuIs36 [egl-26::GFP + unc-119(+)] II. Transcriptional fusion of GFP to egl-26 gene. Nuclear localized. Embryonic expression. Expressed in somatic gonad (uterus and spermatheca) and vulva in vulE and vulB in L4. Spermatheca expression persists into adulthood. Expressed in pharyngeal-intestinal junction cells and in tail.

100% bag of worms. Low percentage of dead larvae. Slightly dumpy. ku9 completely suppresses let-60(n1046) Muv phenotype.

kuIs55 [lon-3::GFP + unc-119(+)]. Rollers. The kuIs55 lon-3::GFP transgene does not rescue the Lon phenotype of lon-3 mutants, but instead causes an adult Rol (Roller) phenotype both in lon-3 mutants and in wild-type backgrounds. Reference: Suzuki Y, et al. 2002. Genetics 162: 1631–1639.

Heterozygotes are WT and segregate WT, lin-25 homozygotes (which are temperature sensitive: at 25C adult hermaphrodites are vulvaless, at 15C 8% of adult hermaphrodites are vulvaless), and scc-3 homozygotes which are Pvl and Sterile (vulval morphogenesis defects and defects in sister-chromatin cohesion).

Semi-dominant suppressor of let-60(n1046). Strong reduction of function mutation. At 20C: <1% Muv, 24% Egl, 6% larval lethal, and SM migration defects.

Semidominant suppressor of let-60(n1046).

Double mutants displayed a severe defect in seam-cell development, implicating a retarded heterochronic phenotype. Protruding vulva phenotype. Increased number of seam cells. Reference: Zhang L, et al. Mol Cell. 2007 Nov 30;28(4):598-613. PMID: 18042455

Superficially wild-type. Identified in a screen for suppressors of the Multivulva (Muv) phenotype in lin-31 loss-of-function (lf) mutants. Reference: Ding L, et al. Mol Cell. 2005 Aug 19;19(4):437-47. PMID: 16109369.

wIs51 [SCMp::GFP + unc-119(+)] V. kuEx194 [elt-1(+) + sur-5p::DsRed]. GFP expression in seam cells. Pick DsRed+ animals to maintain. In a daf-12(WT) background, elt-1(ku491) exhibits some precocious fusion of seamcells and gaps in alae. elt-1(ku491); daf-12(rh61rh411) double mutants have more sever heterochronic phenotypes including seamcell proliferation and bursting vulvae. Reference: Cohen ML, et al. PLoS Genet. 2015 Mar 27;11(3):e1005099.

Superficially wildtype. Homozygous nprl-3(ku540) can suppress the early larval arrest phenotype of mmBCFA deficiency mutants elo-5(gk208) and cgt-1(tm1027) cgt-3(tm504). References: Zhu H, et al. Elife. 2013 May 21;2:e00429. Zhu H, Sewell AK, Han M. Genes Dev. 2015 Jun 15;29(12):1218-23.

Suppresses the developmental arrest of elo-5(gk208). Slightly delayed development/growth.

Weak hypomorphic allele of lin-45. Animals are Dpy but otherwise appear normal.

Weak hypomorphic allele of lin-45. Animals are Dpy but otherwise appear normal. Occasional larval lethality.

No obvious morphological phenotype on its own. Good suppressor of Muv of let-60(n1046).

keyIs21 [egl-6p::HisCl::unc-54 3' UTR + egl-6p::mCherry::unc-54 3' UTR + lin-15(+)]. Animals express HisCl and mCherry in the HSN neurons, two head sheath glia, two tail neurons, and 1-2 head neurons. Expression is bright in the head and tail. Animals are slightly egg-laying defective, ~10% of animals are Egl. Reference: Ravi B, et al. J. Neuroscience. 38 (28), 6283-6298.

keyIs19 [ceh-24::HisCl::unc-54 3'UTR + lin-15(+)]. Animals express Histamine gated chloride channel (HisCl) under the ceh-24 promoter in vulval muscle, a pair of pharyngeal muscles, and two head neurons; can be used for reversible silencing of vulval muscles and inhibition of egg-laying behavior. Reference: Ravi B, et al. J. Neuroscience. 38 (28), 6283-6298.

risIs31 [hsp-16.2p::grh-1b::GFP + unc-119(+)]. Long lived without heat shock. Heat shock induces over-expression of grh-1 causing short-lived phenotype and nuclear GFP expression. Described as "hsp-16.2p::grh-1::gfp OEx line 1" in referenced paper. Reference: Grigolon G, et al. Nat Commun. 2022 Jan 10;13(1):107. doi: 10.1038/s41467-021-27732-4. PMID: 35013237.

risls32 [grh-1p::grh-1b::GFP + unc-119(+)]. Over-expression of grh-1 from its endogenous promoter. Short lived, no GFP signal visible. Reference: Grigolon G, et al. Nat Commun. 2022 Jan 10;13(1):107. doi: 10.1038/s41467-021-27732-4. PMID: 35013237.

Animals grow to be adults with smaller than normal body size and produce a reduced number of progeny on TPA-containing medium. No other apparent phenotypes were so far observed on NGM. Tc1 was originally inserted into a 2.4 kb HindIII genomic fragment. The 1.8 kb portion adjacent to the 3' end of the inserted Tc1 was replaced by an unidentified 1.0 kb fragment probably due to rearrangement during backcrossing.

GFP::3xFLAG tags inserted at N-terminus of endogenous lin-45 locus. Wild-type morphology. Reference: Townley R, et al. Sci Signal. 2023 Aug 29;16(800):eabq4355. doi: 10.1126/scisignal.abq4355. PMID: 37643243.

mcEx401 [mlc-4p::GFP::mlc-4(WT) + pie-1p::GFP::mlc-4(WT) + rol-6(su1006)]. Rollers. Apparent homozygous lethal deletion chromosome balanced by glp-1- and dpy-19-marked recombination suppressor. Heterozygotes are WT Rol, and segregate WT Rol, sterile Dpy (qC1 homozygotes), late embryonic - early larval lethal (mlc-4 homozygotes) and Sterile Rollers. Pick WT Rol and check for correct segregation of progeny to maintain. Reference: Gally C et al. Development. 2009 Sep;136(18):3109-19.

mcEx402 [mlc-4p::GFP::mlc-4(DD) + pie-1p::GFP::mlc-4(WT) + rol-6(su1006)]. Rollers. Apparent homozygous lethal deletion chromosome balanced by glp-1- and dpy-19-marked recombination suppressor. Heterozygotes are WT Rol, and segregate WT Rol, sterile Dpy (qC1 homozygotes), late embryonic - early larval lethal (mlc-4 homozygotes) and Sterile Rollers. Pick WT Rol and check for correct segregation of progeny to maintain. Reference: Gally C et al. Development. 2009 Sep;136(18):3109-19.

mcIs54 [dpy-7p::spas-1::SL2(operon)::mCherry + unc-119(+)] X. Dpy. Expression of Spastin transgene depletes microtubules specifically in the hypodermis, creating a Dpy phenotype. Reference: Quintin S, et al. Development. 2016 Jan 1;143(1):160-73.

Animals are dye-filling negative. A bit sick with about 30% dying during larval development and the others displaying a number of defects in organs/tissues containing hypodermal cells (hypodermis, rectum, vulva, excretory system).

Heterozygotes are WT and segregate dead eggs, DpyUncs and WT. lin-26(mc15) is a molecular null due to a deletion of most of lin-26 coding sequence.