WormMine: Gene WBGene00002050

• WormBase Gene ID: WBGene00002050
• Gene Name: ifa-1
• Sequence Name: F38B2.1
• Brief Description: IFA-1 encodes an essential intermediate filament protein that is coexpressed with the essential IF protein IFB-1; IFA-1 is required for survival past the L1 larva stage, and a normal intestine; IFA-1 forms heteropolymeric intermediate filaments in vitro with an equimolar mixture of IFB-1; IFA-1 is predicted to function as a structural component of the cytoskeleton, and is required for larval development and normal intestinal morphology; ifa-1 is expressed in amphid sensory neurons, in tail neurons and other unidentified neurons, some pharyngeal muscles, the pharyngeal-intestinal valve, the vulva, and the rectum.
• Organism: Caenorhabditis elegans
• Automated Description: Predicted to be a structural constituent of cytoskeleton. Predicted to be involved in several processes, including heterochromatin formation; nucleus organization; and protein localization to nuclear envelope. Located in intermediate filament. Expressed in several structures, including egg-laying apparatus; excretory cell; neurons; pharyngeal-intestinal valve; and pharynx. Human ortholog(s) of this gene implicated in partial lipodystrophy; primary autosomal recessive microcephaly; and progressive myoclonus epilepsy 9. Is an ortholog of human LMNB2 (lamin B2).
• Biotype: SO:0001217
• Genetic Position: X :2.86537 ±0.001386
• Length (nt): 4317

1 Organism

• Name: Caenorhabditis elegans
• Taxon Id: 6239

1 Synonyms

• Value: WBGene00002050

Genomics

5 Transcripts

WormMine ID	Sequence Name	Length (nt)	Chromosome Location
Transcript:F38B2.1a.1	F38B2.1a.1	1949	X: 11271182-11275498
Transcript:F38B2.1d.1	F38B2.1d.1	1779	X: 11271248-11275343
Transcript:F38B2.1b.1	F38B2.1b.1	1976	X: 11271553-11275485
Transcript:F38B2.1e.1	F38B2.1e.1	1954	X: 11272797-11275482
Transcript:F38B2.1c.1	F38B2.1c.1	1848	X: 11273270-11275485

Other

5 CDSs

WormMine ID	Sequence Name	Length (nt)	Chromosome Location
CDS:F38B2.1a	F38B2.1a	1728	X: 11271248-11271269
CDS:F38B2.1b	F38B2.1b	1728	X: 11271659-11271680
CDS:F38B2.1c	F38B2.1c	1704	X: 11273272-11273341
CDS:F38B2.1d	F38B2.1d	1779	X: 11271248-11271320
CDS:F38B2.1e	F38B2.1e	1815	X: 11272797-11272905

48 RNAi Result

• WBRNAi00098341
• WBRNAi00000700
• WBRNAi00046681
• WBRNAi00014536
• WBRNAi00105981
• WBRNAi00106051
• WBRNAi00109636
• WBRNAi00080578
• WBRNAi00030248
• WBRNAi00098347
• WBRNAi00007214
• WBRNAi00109248
• WBRNAi00116161
• WBRNAi00062637
• WBRNAi00062638
• WBRNAi00025436
• WBRNAi00027326
• WBRNAi00109345
• WBRNAi00066566
• WBRNAi00105700
• WBRNAi00105702
• WBRNAi00105701
• WBRNAi00105704
• WBRNAi00105703
• WBRNAi00105706
• WBRNAi00105705
• WBRNAi00105708
• WBRNAi00105707
• WBRNAi00105710
• WBRNAi00105709

77 Allele

• gk964260
• gk964029
• gk962707
• gk964028
• gk963810
• WBVar01759446
• WBVar01690402
• ttTi14140
• gk293829
• gk293828
• gk293827
• WBVar02009111
• WBVar02083479
• WBVar02009110
• WBVar00067850
• WBVar00067855
• WBVar00083093
• WBVar00067860
• gk797893
• gk912559
• gk605374
• gk676402
• gk574732
• gk526200
• gk338630
• gk423105
• gk476328
• gk857751
• gk469110
• gk348848

1 Chromosome

• WormBase ID: X
• Organism: Caenorhabditis elegans
• Length (nt): 17718942

1 Chromosome Location

• Feature . Primary Identifier: WBGene00002050
• Start: 11271182
• End: 11275498
• 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_chrX_11275499..11278400
• Length (nt): 2902
• Chromosome Location: X: 11275499-11278400
• Organism: Caenorhabditis elegans

216 Expression Clusters

Regulated By Treatment	Description	Algorithm	Primary Identifier
	oocyte proteins identified by two or more unique peptides during proteomics study.	In the pooled data set, 1453 C. elegans proteins were identified with a probability >= 0.9 according to ProteinProphet, of which 1165 proteins were identified by more than one unique peptide.	WBPaper00038289:oocyte_protein
	Genes with expression altered >= 3-fold in dpy-10(e128) mutants.	Data across the wild type series was analyzed using the Significance analysis of Microarrays (SAM) algorithm (to calculate the False Discovery Rate (FDR)).	WBPaper00035873:dpy-10_regulated
	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
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
	TGF- Dauer pathway adult transcriptional targets. Results obtained by comparing the microarray results of the dauer-constitutive mutants daf-7(e1372), daf-7(m62), and daf-1(m40) with dauer-defective mutants daf-3(mgDf90), daf-5(e1386), and daf-7(e1372);daf-3(mgDf90) double mutants at the permissive temperature, 20C, on the first day of adulthood.	SAM	WBPaper00031040:TGF-beta_adult_upregulated
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
	Transcripts that showed significantly increased expression glp-1(e2141); TU3401 animals comparing to in TU3401 animals.	Fold change > 2, FDR < 0.01.	WBPaper00065993:glp-1(e2141)_upregulated
	Transcripts that showed significantly increased expression in ogt-1(ok1474) neuronal cells isolated by FACs comparing to in FACs isolated neuronal cells from wild type.	DESeq2, fold change > 2, FDR < 0.05.	WBPaper00066485:ogt-1(ok1474)_upregulated_neuron
	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
	Proteins interacting with NHR-49-GFP according to co-IP and LC-MS.	N.A.	WBPaper00064071:NHR-49_interacting
	Transcripts that showed significantly decreased expression at 5-days-post L4 adult N2 hermaphrodites comparing to 1-day-post L4 adult N2 hermaphrodites.	DESeq2, fold change > 2, FDR < 0.05	WBPaper00065835:Day5_vs_Day1_downregulated
	Transcripts expressed in GABAergic neuron, according to PAT-Seq analysis using Punc-47-GFP-3XFLAG mRNA tagging.	Cufflinks FPKM value >=1.	WBPaper00050990:GABAergic-neuron_expressed
	Transcripts that showed significantly decreased expression at 11-days-post L4 adult N2 hermaphrodites comparing to 1-day-post L4 adult N2 hermaphrodites.	DESeq2, fold change > 2, FDR < 0.05	WBPaper00065835:Day11_vs_Day1_downregulated
	Transcripts expressed in hypodermis, according to PAT-Seq analysis using Pdpy-7-GFP-3XFLAG mRNA tagging.	Cufflinks FPKM value >=1.	WBPaper00050990:hypodermis_expressed
	Transcripts expressed in intestine, according to PAT-Seq analysis using Pges-1-GFP-3XFLAG mRNA tagging.	Cufflinks FPKM value >=1.	WBPaper00050990:intestine_expressed
mitochondrial sulfide delivery molecule (mtH2S) AP39	Transcripts that showed significantly increased expression in N2 animals treated with mitochondrial sulfide delivery molecule (mtH2S) AP39 starting from 1-day-post L4 until 11 days post L4.	DESeq2, fold change > 2, FDR < 0.05	WBPaper00065835:mtH2S-AP39-D0-treatment_upregulated_Day11
	Transcripts expressed in pharynx, according to PAT-Seq analysis using Pmyo-2-GFP-3XFLAG mRNA tagging.	Cufflinks FPKM value >=1.	WBPaper00050990:pharynx_expressed
	Genes with expression level regulated by genotype (N2 vs CB4856) and age at L3 larva and Late reproduction stage (96 hours at 24 centigrade).	For model 2, authors used 100 permutations to estimate the FDR threshold. Per permutation, genotypes and ages were independently randomly distributed, keeping the among-gene structure intact. Then for each spot (23,232) on the array, model 2 was tested. The obtained P-values were used to estimate a threshold for each of the explanatory factors. Authors also used a genome-wide threshold of -log10 P-value = 2, which resembles an FDR of 0.072 and 0.060 for marker and the interaction age-marker for the developing worms and FDR of 0.050 and 0.065 for marker and age-marker for the aging worms. For the physiological age effect, authors used a log10 P-value = 8 in developing worms (0.012 FDR) and -log10 P-value = 6 (0.032 FDR).	WBPaper00040858:eQTL_age_regulated_developing
	Transcripts that showed significantly increased expression in day 1 adult hermaphrodite comparing to in L4 larva daf-16(mu86);glp-1(e2141) animals.	Fold change > 2, FDR < 0.05	WBPaper00064088:Day-1-adult_vs_L4_upregulated_daf-16(mu86);glp-1(e2141)
	Genes with expression level regulated by genotype (N2 vs CB4856) at L3 larva and Late reproduction stage (96 hours at 24 centigrade).	For model 2, authors used 100 permutations to estimate the FDR threshold. Per permutation, genotypes and ages were independently randomly distributed, keeping the among-gene structure intact. Then for each spot (23,232) on the array, model 2 was tested. The obtained P-values were used to estimate a threshold for each of the explanatory factors. Authors also used a genome-wide threshold of -log10 P-value = 2, which resembles an FDR of 0.072 and 0.060 for marker and the interaction age-marker for the developing worms and FDR of 0.050 and 0.065 for marker and age-marker for the aging worms. For the physiological age effect, authors used a log10 P-value = 8 in developing worms (0.012 FDR) and -log10 P-value = 6 (0.032 FDR).	WBPaper00040858:eQTL_regulated_developing
	Transcripts that showed significantly decreased expression in day 3 adult hermaphrodite comparing to in L4 larva glp-1(e2141) animals.	Fold change > 2, FDR < 0.05	WBPaper00064088:Day-3-adult_vs_L4_downregulated_glp-1(e2141)
Bacteria infection: Bacillus thuringiensis	Transcripts that showed significantly increased expression in N2 animals infected by bacteria BMB171/Cry5Ba, an acrystalliferous Bt mutant BMB171 transformed with toxin gene cry5Ba on the shuttle vector pHT304, comparing to N2 animals infected by BMB171/pHT304.	N.A.	WBPaper00064229:B.thuringiensis-Cry5Ba_upregulated
	Transcripts that showed significantly increased expression after four-day-old young adult worms were placed on NGM plates seeded with OP50 in the presence 5% Agaro-oligosaccharides(AGO) for 24 h, comparing to animals grown in the absence of AGO.	Fold change > 2.	WBPaper00064306:Agaro-oligosaccharides_upregulated
	Transcripts that showed significantly increased expression in sin-3(tm1276) comparing to in N2.	DESeq2, fold change > 2, p-value < 0.01.	WBPaper00061203:sin-3(tm1276)_upregulated
Dietary restriction	Transcripts that showed significantly decreased expression after N2 animals were under dietary restriction (DR, OP50 OD = 0.1) from 3-day post L4 till 6-day post L4 adult hermaphrodite stage, comparing to under ad libtum (AL, OP50 OD = 3) condition.	Bioconductor package edgeR, p < 0.05.	WBPaper00056443:DietaryRestriction_downregulated
	Transcripts that showed significantly increased expression in aak-1(tm1944);aak-2(ok524) animals comparing to in N2.	DEseq 1.18.0, adjusted p-value < 0.05.	WBPaper00056471:aak-1(tm1944);aak-2(ok524)_upregulated
	Genes that showed significantly increased expression in daf-2(e1370) comparing to in N2.	To identify DEGs, Students t test and the log2 median ratio test were performed to compute t values and median ratios for all the annotated genes. The adjusted P values from each test were computed using an empirical distribution of the null hypothesis, which was obtained from random permutations of the samples. Finally, the adjusted P values from the individual tests were combined to compute the overall P values using Stouffers method , and genes with overall P < 0.05 and fold change > 1.5 were selected as DEGs.	WBPaper00047131:daf-2(e1370)_upregulated_N2-background
	Transcripts that showed significantly decreased expression in N2 animals exposed to 0.1mM Paraquat from hatching to reaching adult stage.	DESeq2 version 1.22.2, p < 0.05	WBPaper00064716:paraquat_downregulated
	Transcripts that showed significantly increased expression in daf-2(e1370) comparing to in control animals.	NOIseq(v2.34.0), fold change > = 1.5, Differentially expressed genes (DEGs) were defined as having a probability of differentialexpression > 95%.	WBPaper00064727:daf-2(e1370)_upregulated

7 Expression Patterns

• Primary Identifier: Expr1031203
• Pattern: Tiling arrays expression graphs

• Primary Identifier: Expr2762
• Pattern: A1a/GFP was expressed and integrated into the thick filament bundles of the pharynx, the excretory cell, the vulva and the rectum of the larva. The strong expression in the pharynx was visible already in late embryos. In adults, an additional GFP-containing network was found in the uterus.
• Subcellular Localization: thick filament

• Primary Identifier: Expr1150559
• Pattern: Developmental gene expression time-course. Raw data can be downloaded from ftp://caltech.wormbase.org/pub/wormbase/datasets-published/hashimshony2015

• Primary Identifier: Expr1495
• Remark: Cannot find sequence info for IF A1 in this article. --wjc. Protein_Description: Intermediate Filament gene A1. Reporter gene fusion type not specified.
• Pattern: The A1 promoter gfp reporter was expressed in cells associated with amphid sensory neurons, the pharyngeal-intestinal valve, the vulva, a few yet unidentified neurons, as well as in the rectum and some neurons of the tail. In addition, there was some mosaicism for small and as yet unidentified muscles of the pharynx. Not all A1 promoter gfp worms showed GFP expression in these cells.

• Primary Identifier: Expr2012676
• 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: Expr1013956
• Pattern: Developmental gene expression time-course. Raw data can be downloaded from ftp://caltech.wormbase.org/pub/wormbase/datasets-published/levin2012

• Primary Identifier: Expr2030912
• 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).

15 GO Annotation

13 Homologues

1 Locations

• Feature . Primary Identifier: WBGene00002050
• Start: 11271182
• End: 11275498
• Strand: 1

15 Ontology Annotations

0 Regulates Expr Cluster

1 Sequence

• Length: 4317

1 Sequence Ontology Term