WormMine: Gene WBGene00004333

• WormBase Gene ID: WBGene00004333
• Gene Name: rec-8
• Sequence Name: W02A2.6
• Brief Description: rec-8 encodes a meiosis-specific cohesin complex subunit orthologous to Saccharomyces cerevisiae and Schizosaccharomyces pombe Rec8p; REC-8 is essential for pairing of homologoues and sister chromatids during meiosis and thus for proper chromosome disjunction; in the germline, REC-8 associates with chromatin of transition zone nuclei, and co-localizes with SMC-1 along the longitudinal axes of synapsed chromosomes at pachytene and in a cruciform pattern at diakinesis; REC-8 localization to chromatin is dependent upon TIM-1, a HEAT/Armadillo repeat-containing protein related to Drosophila TIMELESS, and additionally, REC-8 and SCC-3 are mutually required for chromatin localization; REC-8 cleavage and degradation during meiosis I is dependent on the AIR-2 aurora-like kinase and during meiosis II on AIR-2 and the PLK-1 polo-like kinase.
• Organism: Caenorhabditis elegans
• Automated Description: Predicted to enable chromatin binding activity and damaged DNA binding activity. Involved in several processes, including meiotic chromosome segregation; meiotic sister chromatid cohesion; and regulation of centriole-centriole cohesion. Located in nuclear lumen and spindle. Part of chromatin. Expressed in Z2; Z3; embryonic cell; and gonad.
• Biotype: SO:0001217
• Genetic Position: IV :8.53422 ±0.001584
• Length (nt): 4072

1 Organism

• Name: Caenorhabditis elegans
• Taxon Id: 6239

1 Synonyms

• Value: WBGene00004333

Genomics

3 Transcripts

WormMine ID	Sequence Name	Length (nt)	Chromosome Location
Transcript:W02A2.6a.1	W02A2.6a.1	2465	IV: 13349122-13353193
Transcript:W02A2.6c.1	W02A2.6c.1	75	IV: 13349241-13349315
Transcript:W02A2.6b.1	W02A2.6b.1	1764	IV: 13349241-13352027

Other

3 CDSs

WormMine ID	Sequence Name	Length (nt)	Chromosome Location
CDS:W02A2.6a	W02A2.6a	2346	IV: 13349241-13349329
CDS:W02A2.6b	W02A2.6b	1764	IV: 13349241-13349329
CDS:W02A2.6c	W02A2.6c	75	IV: 13349241-13349315

25 RNAi Result

• WBRNAi00083896
• WBRNAi00063291
• WBRNAi00063294
• WBRNAi00103810
• WBRNAi00081200
• WBRNAi00081203
• WBRNAi00000353
• WBRNAi00054548
• WBRNAi00019482
• WBRNAi00062855
• WBRNAi00088918
• WBRNAi00083897
• WBRNAi00083899
• WBRNAi00036166
• WBRNAi00005008
• WBRNAi00081197
• WBRNAi00081196
• WBRNAi00081207
• WBRNAi00081208
• WBRNAi00081199
• WBRNAi00081198
• WBRNAi00081201
• WBRNAi00081202
• WBRNAi00081204
• WBRNAi00022925

63 Allele

• gk964078
• gk963546
• gk963547
• gk964500
• gk962765
• gk964111
• gk964110
• gk486371
• gk486372
• gk730949
• gk824378
• gk715389
• gk849498
• gk500309
• gk690442
• gk778717
• gk467181
• gk914732
• gk813075
• gk588159
• gk717492
• gk509770
• gk466232
• gk577245
• gk693066
• gk393139
• gk756196
• gk796137
• gk831574
• WBVar02122148

1 Chromosome

• WormBase ID: IV
• Organism: Caenorhabditis elegans
• Length (nt): 17493829

1 Chromosome Location

• Feature . Primary Identifier: WBGene00004333
• Start: 13349122
• End: 13353193
• Strand: -1

4 Data Sets

• WormBaseAcedbConverter
• GO Annotation data set
• C. elegans genomic annotations (GFF3 Gene)
• Panther orthologue and paralogue predictions

1 Downstream Intergenic Region

• WormBase ID: intergenic_region_chrIV_13348832..13349121
• Length (nt): 290
• Chromosome Location: IV: 13348832-13349121
• Organism: Caenorhabditis elegans

131 Expression Clusters

Regulated By Treatment	Description	Algorithm	Primary Identifier
	Transcripts of coding genes that showed significantly decreased expression in muscle.	DESeq2 (version 1.24.0). Transcripts with a false-discovery rate adjusted p-value less than 0.05 were considered significantly differentially expressed.	WBPaper00062325:muscle_depleted_coding-RNA
	Transcripts expressed in neuronal cells, by analyzingfluorescence-activated cell sorted (FACS) neurons.	DESeq. False discovry rate (FDR) < 0.1.	WBPaper00048988:neuron_expressed
	Genes that showed expression levels higher than the corresponding reference sample (embryonic 24hr reference).	A Mann-Whitney U test with an empirical background model and FDR correction for multiple testing was used to detect expressed transcripts (Benjamini and Hochberg 1995). Genes and TARs with an FDR <= 0.05 were reported as expressed above background. Authors detected differentially expressed transcripts using a method based on linear models. Genes and TARs were called differentially expressed if the FDR was <= 0.05 and the fold change (FC) >= 2.0. To more strictly correct for potential false-positives resulting from multiple sample comparisons, authors divided individual FDR estimates by the number of samplesor sample comparisons, respectively. This resulted in an adjusted FDR of 1.3 * 0.0001 for expression above background and of 7.4 * 0.0001 for differential expression. Authors called genes selectively enriched in a given tissue if they met the following requirements: (1) enriched expression in a given tissue (FDR <= 0.05 and FC >= 2.0), (2) fold change versus reference among the upper 40% of the positive FC range observed for this gene across all tissues, and (3) fold-change entropy among the lower 40% of the distribution observed for all genes.	WBPaper00037950:all-neurons_L1-larva_expressed
adult vs dauer larva	Transcripts that showed differential expression in adult vs dauer lava in N2 animals at 20C.	N.A.	WBPaper00050488:adult_vs_dauer_regulated_N2_20C
	mRNAs that showed decreased expression in 1 cell mebryo comparing to in oocyte, according to RNAseq analysis.	Gaussian error propagation. As cutoff for the up-regulated genes authors used log2 fold change > 1 and P < 0.05 and as cutoff for the down-regulated genes authors used log2 fold change < -1 and P < 0.05.	WBPaper00045420:fertilization_downregulated_transcript
	Genes that showed expression levels higher than the corresponding reference sample (embryonic 24hr reference).	A Mann-Whitney U test with an empirical background model and FDR correction for multiple testing was used to detect expressed transcripts (Benjamini and Hochberg 1995). Genes and TARs with an FDR <= 0.05 were reported as expressed above background. Authors detected differentially expressed transcripts using a method based on linear models. Genes and TARs were called differentially expressed if the FDR was <= 0.05 and the fold change (FC) >= 2.0. To more strictly correct for potential false-positives resulting from multiple sample comparisons, authors divided individual FDR estimates by the number of samplesor sample comparisons, respectively. This resulted in an adjusted FDR of 1.3 * 0.0001 for expression above background and of 7.4 * 0.0001 for differential expression. Authors called genes selectively enriched in a given tissue if they met the following requirements: (1) enriched expression in a given tissue (FDR <= 0.05 and FC >= 2.0), (2) fold change versus reference among the upper 40% of the positive FC range observed for this gene across all tissues, and (3) fold-change entropy among the lower 40% of the distribution observed for all genes.	WBPaper00037950:AVE-neuron_L1-larva_expressed
Osmotic stress	Transcripts that showed significantly altered expression with 500 mM salt (NaCl) vs 100 mM salt when food was present	DESeq(version 1.10.1), FDR < 0.05.	WBPaper00050726:OsmoticStress_regulated_Food
	Genes that showed expression levels higher than the corresponding reference sample (embryonic 24hr reference).	A Mann-Whitney U test with an empirical background model and FDR correction for multiple testing was used to detect expressed transcripts (Benjamini and Hochberg 1995). Genes and TARs with an FDR <= 0.05 were reported as expressed above background. Authors detected differentially expressed transcripts using a method based on linear models. Genes and TARs were called differentially expressed if the FDR was <= 0.05 and the fold change (FC) >= 2.0. To more strictly correct for potential false-positives resulting from multiple sample comparisons, authors divided individual FDR estimates by the number of samplesor sample comparisons, respectively. This resulted in an adjusted FDR of 1.3 * 0.0001 for expression above background and of 7.4 * 0.0001 for differential expression. Authors called genes selectively enriched in a given tissue if they met the following requirements: (1) enriched expression in a given tissue (FDR <= 0.05 and FC >= 2.0), (2) fold change versus reference among the upper 40% of the positive FC range observed for this gene across all tissues, and (3) fold-change entropy among the lower 40% of the distribution observed for all genes.	WBPaper00037950:bodywall-muscle_L1-larva_expressed
	Genes that were upregulated in lin-15B(n744).	For each gene in each microarray hybridization experiment, the ratio of RNA levels from the two samples was transformed into a log2 value and the mean log2 ratio was calculated. The log2 ratios were normalized by print-tip Loess normalization (Dudoit and Yang, 2002). All genes with a false discovery rate of <= 5% (q <= 0.05) (Storey and Tibshirani, 2003) and a mean fold-change ratio of >= 1.5 were selected for further analysis.	WBPaper00038168:lin-15B(n744)_upregulated
	Transcripts expressed in hypodermis, according to PAT-Seq analysis using Pdpy-7-GFP-3XFLAG mRNA tagging.	Cufflinks FPKM value >=1.	WBPaper00050990:hypodermis_expressed
	Transcripts that showed significantly increased expression in day 1 adult hermaphrodite comparing to in L4 larva fem-3(q20) animals.	Fold change > 2, FDR < 0.05	WBPaper00064088:Day-1-adult_vs_L4_upregulated_fem-3(q20)
	Transcripts that showed significantly increased expression in day 3 adult hermaphrodite comparing to in L4 larva fem-3(q20) animals.	Fold change > 2, FDR < 0.05	WBPaper00064088:Day-3-adult_vs_L4_upregulated_fem-3(q20)
	Maternal class (M): genes that are called present in at least one of the three PC6 replicates.	A modified Welch F statistic was used for ANOVA. For each gene, regressed error estimates were substituted for observed error estimates. The substitution is justified by the lack of consistency among the most and least variable genes at each time point. Regressed error estimates were abundance-dependent pooled error estimates that represented a median error estimate from a window of genes of similar abundance to the gene of interest. A randomization test was used to compute the probability Pg of the observed F statistic for gene g under the null hypothesis that developmental time had no effect on expression. P-values were not corrected for multiple testing.	[cgc5767]:expression_class_M
	Strictly maternal class (SM): genes that are the subset of maternal genes that are not also classified as embryonic.	A modified Welch F statistic was used for ANOVA. For each gene, regressed error estimates were substituted for observed error estimates. The substitution is justified by the lack of consistency among the most and least variable genes at each time point. Regressed error estimates were abundance-dependent pooled error estimates that represented a median error estimate from a window of genes of similar abundance to the gene of interest. A randomization test was used to compute the probability Pg of the observed F statistic for gene g under the null hypothesis that developmental time had no effect on expression. P-values were not corrected for multiple testing.	[cgc5767]:expression_class_SM
	Transcripts that showed significantly changed expression in 6-day post-L4 adult hermaphrodite comparing to in 1-day post L4 adult hermaphrodite animals.	Sleuth	WBPaper00051558:aging_regulated
	Transcripts that showed significantly altered expression after 24 hour exposure to stavudine (d4T) starting at L1 lava stage.	DESeq	WBPaper00053302:stavudine_24h_regulated
	Transcripts that showed significantly increased expression in 10-days post L4 adult hermaphrodite N2 grown at 20C, comparing to in 1-day post L4 adult hermaphrodite N2 animals grown at 20C.	CuffDiff, fold change > 2.	WBPaper00065096:Day10_vs_Day1_upregulated
	Transcripts that showed significantly decreased expression in tetraploid N2 comparing to diploid N2 animals at L4 larva stage.	DESeq2 R package (1.20.0), fold change > 2, and FDR < 0.05.	WBPaper00066110:tetraploid_vs_diploid_downregulated
	Transcripts that were regulated by both set-6(ok2195) and baz-2(tm0235) at 2-day post L4 adult hermaphrodite stage.	N.A.	WBPaper00059356:set-6(ok2195)_baz-2(tm0235)_regulated
	Genes that showed expression levels higher than the corresponding reference sample (embryonic 0hr reference).	A Mann-Whitney U test with an empirical background model and FDR correction for multiple testing was used to detect expressed transcripts (Benjamini and Hochberg 1995). Genes and TARs with an FDR <= 0.05 were reported as expressed above background. Authors detected differentially expressed transcripts using a method based on linear models. Genes and TARs were called differentially expressed if the FDR was <= 0.05 and the fold change (FC) >= 2.0. To more strictly correct for potential false-positives resulting from multiple sample comparisons, authors divided individual FDR estimates by the number of samplesor sample comparisons, respectively. This resulted in an adjusted FDR of 1.3 * 0.0001 for expression above background and of 7.4 * 0.0001 for differential expression. Authors called genes selectively enriched in a given tissue if they met the following requirements: (1) enriched expression in a given tissue (FDR <= 0.05 and FC >= 2.0), (2) fold change versus reference among the upper 40% of the positive FC range observed for this gene across all tissues, and (3) fold-change entropy among the lower 40% of the distribution observed for all genes.	WBPaper00037950:germline-precursors_blastula-embryo_expressed
	Transcripts that showed significantly decreased expression in rbr-2(tm3141) comparing to in N2 animals.	Mapped reads were analyzed for transcript assembly and differential expression using Cufflinks 2.1.1 with a filter of twofold difference and FDR correction (P < 0.05).	WBPaper00050080:rbr-2(tm3141)_downregulated
	Genes that showed expression levels higher than the corresponding reference sample (L3/L4 all cell reference).	A Mann-Whitney U test with an empirical background model and FDR correction for multiple testing was used to detect expressed transcripts (Benjamini and Hochberg 1995). Genes and TARs with an FDR <= 0.05 were reported as expressed above background. Authors detected differentially expressed transcripts using a method based on linear models. Genes and TARs were called differentially expressed if the FDR was <= 0.05 and the fold change (FC) >= 2.0. To more strictly correct for potential false-positives resulting from multiple sample comparisons, authors divided individual FDR estimates by the number of samplesor sample comparisons, respectively. This resulted in an adjusted FDR of 1.3 * 0.0001 for expression above background and of 7.4 * 0.0001 for differential expression. Authors called genes selectively enriched in a given tissue if they met the following requirements: (1) enriched expression in a given tissue (FDR <= 0.05 and FC >= 2.0), (2) fold change versus reference among the upper 40% of the positive FC range observed for this gene across all tissues, and (3) fold-change entropy among the lower 40% of the distribution observed for all genes.	WBPaper00037950:hypodermis_L3-L4-larva_expressed
	Transcripts that showed significantly increased expression in ilc-17.1(syb5296) comparing to in N2 animals at L4 larva stage.	DESeq2, fold change > 2, FDR < 0.05.	WBPaper00066594:ilc-17.1(syb5296)_upregulated
	Transcripts that showed significantly increased expression in hda-1(RNAi) embryos comparing to control animals.	DESeq2, fold change > 2, FDR < 0.05.	WBPaper00067044:hda-1(RNAi)_upregulated
	Transcripts that showed significantly decreased expression after animals were treated with 100uM Rapamycin and 50uM Rifampicin from day 1 to day 3 adult hermaphradite.	DESeq2(v1.14.1), fold change > 2, p-value < 0.05	WBPaper00055354:Rapamycin-Rifampicin_downregulated
	Transcripts that showed significantly decreased expression after animals were treated with 50uM Rifampicin from day 1 to day 3 adult hermaphradite.	DESeq2(v1.14.1), fold change > 2, p-value < 0.05	WBPaper00055354:Rifampicin_downregulated
	Transcripts detected in germline isolated from day-1 adult hermaphrodite animals.	All three experiments have CPM >= 1.	WBPaper00067147:germline_expressed
	Genes that were not enriched in either spermatogenic fem-3(q96gf) nor oogenic fog-2(q71) gonads, according to RNAseq analysis.	To identify differentially expressed transcripts, authors used R/Bioconductor package DESeq.	WBPaper00045521:Gender_Neutral
	Transcripts that showed altered expression from P0 to F2 generation animals after N2 parental generation were treated with antimycin, but not in damt-1(gk961032) P0 to F2 animals after the parenal generaton were treated with antimycin.	N.A.	WBPaper00055862:antimycin_damt-1(gk961032)_regulated
Starvation	Transcripts that showed significantly altered expression by starvation with 100 mM salt (NaCl)	DESeq(version 1.10.1), FDR < 0.05.	WBPaper00050726:starvation_regulated_LowSalt

9 Expression Patterns

• Primary Identifier: Expr1032151
• Pattern: Tiling arrays expression graphs

• Primary Identifier: Expr16473
• Pattern: rec-8::mNeonGreen is expressed in the mitotic zone of the germline.

• Primary Identifier: Expr2451
• Remark: No immunofluorescence was detected after rec-8 RNAi, i.e., in the gonads of F1 worms from embryos laid by animals 24 h or later after dsRNA injection. Also the staining with preimmune serum was negative.
• Pattern: The protein was absent from somatic cells. Expressed in the gonad.
• Subcellular Localization: In the gonad, REC-8 was localized as small grains all over the nuclei of the mitotic zone, whereas in the transition zone and in pachytene nuclei, it assembled into short and long threads, respectively. In diakinesis, REC-8 was localized along the axes of chromosomes. From metaphase I through to metaphase II REC-8 signals appeared to become progressively less intense or smaller. In metaphase I, both the poleward and equatorial axes of bivalents were decorated with REC-8 whereas in early anaphase I chromosomes, the length of REC-8 immunosignals seemed to be restricted to the original poleward portion of metaphase I chromosomes. In late anaphase I, individual chromosomes could no longer be discriminated and REC-8 spots were visible within the highly condensed DAPI-positive masses of the two half-nuclei. In metaphase II short tracts of REC-8 were observed in the equatorial plane.

• Primary Identifier: Expr11542
• Pattern: Immunostaining for REC-8 is easily detected in embryonic Z2/Z3. The protein appears to be maternally loaded in early embryos, to diminish significantly by the P4 stage, and then to turn on in Z2/Z3.

• Primary Identifier: Expr1158093
• Pattern: Developmental gene expression time-course. Raw data can be downloaded from ftp://caltech.wormbase.org/pub/wormbase/datasets-published/hashimshony2015

• Primary Identifier: Expr2015291
• Pattern: Single cell embryonic expression. Only cell types with an expression fraction of greater 0.2 of the maximum expressed fraction are labeled (Full data can be downloaded from http://caltech.wormbase.org/pub/wormbase/datasets-published/packer2019/). The colors represent the broad cell class to which the cell type has been assigned. The size of the point is proportional to the log2 of the numbers of cells in the dataset of that cell type. Interactive visualizations are available as a web app (https://cello.shinyapps.io/celegans/) and can also be installed as an R package (https://github.com/qinzhu/VisCello.celegans).

• Primary Identifier: Expr12238
• Subcellular Localization: anti-REC-8 antibody staining was detected in the nucleoplasm and on the DNA (Expr2451) of germ cells within the mitotic zone.

• Primary Identifier: Expr2033525
• Pattern: Single cell embryonic expression. Only cell types with an expression fraction of greater 0.2 of the maximum expressed fraction are labeled (Full data can be downloaded from http://caltech.wormbase.org/pub/wormbase/datasets-published/packer2019/). The colors represent the broad cell class to which the cell type has been assigned. The size of the point is proportional to the log2 of the numbers of cells in the dataset of that cell type. Interactive visualizations are available as a web app (https://cello.shinyapps.io/celegans/) and can also be installed as an R package (https://github.com/qinzhu/VisCello.celegans).

• Primary Identifier: Expr1017580
• Pattern: Developmental gene expression time-course. Raw data can be downloaded from ftp://caltech.wormbase.org/pub/wormbase/datasets-published/levin2012

31 GO Annotation

16 Homologues

1 Locations

• Feature . Primary Identifier: WBGene00004333
• Start: 13349122
• End: 13353193
• Strand: -1

31 Ontology Annotations

0 Regulates Expr Cluster

1 Sequence

• Length: 4072

1 Sequence Ontology Term

• Name: gene

4 Strains

• WBStrain00035158
• WBStrain00035163
• WBStrain00035162
• WBStrain00035963

1 Upstream Intergenic Region

• WormBase ID: intergenic_region_chrIV_13353194..13353722
• Length (nt): 529
• Chromosome Location: IV: 13353194-13353722
• Organism: Caenorhabditis elegans