SSI2 Plant stearoyl-acyl-carrier-protein desaturase family protein [Arabidopsis thaliana (thale cress)] - Gene

Summary

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Official Symbol: SSI2
Official Full Name: Plant stearoyl-acyl-carrier-protein desaturase family protein
Primary source: TAIR:AT2G43710
Locus tag: AT2G43710
See related: Araport:AT2G43710
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Arabidopsis thaliana (ecotype: Columbia)
Lineage: Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae; rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis
Also known as: AtSSI2; F18O19.18; FAB2; FATTY ACID BIOSYNTHESIS 2; LDW1; lesion dwarf mimic 1; suppressor of SA insensitive 2
Summary: Encodes a stearoyl-ACP desaturase, involved in fatty acid desaturation. The ssi2 mutants have increased 18:0 and reduced 18:1 fatty acids. Exogenous application of glycerol to wild type plants mimics the ssi2 mutant phenotype. The altered 18:1 fatty acid content in the ssi2 mutants has an impact on SA- and JA-mediated defense signaling. ssi2 mutants resulted in hyper-resistance to green peach aphid and antibiosis activity in petiole exudates.
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Genomic context

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See SSI2 in Genome Data Viewer

Location:: chromosome: 2

Exon count:: 3

Sequence:: Chromosome: 2; NC_003071.7 (18119873..18122889)

Chromosome 2 - NC_003071.7 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:: NC_003071.7

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Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Characterization of fab2 T-DNA insertion mutants in terms of fatty acid composition and plant phenotype.
Title: Characterization of fab2 T-DNA insertion mutants in terms of fatty acid composition and plant phenotype.
Study identified a mutant that shows constitutive BiP3 protein accumulation without treatment with endoplasmic reticulum (ER) stress inducers. The causal gene for constitutive BiP3 accumulation was found to be SSI2 gene; finding suggests a genetic link between fatty acid metabolism in the chloroplast and ER functions.
Title: Constitutive BiP protein accumulation in Arabidopsis mutants defective in a gene encoding chloroplast-resident stearoyl-acyl carrier protein desaturase.

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Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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NM_129933.4

Supported by ESTs:

NM_180069.1

Supported by ESTs:

Gene Ontology Provided by TAIR

Function	Evidence Code	Pubs
enables stearoyl-CoA 9-desaturase activity	IDA Inferred from Direct Assay more info	PubMed
enables stearoyl-CoA 9-desaturase activity	IMP Inferred from Mutant Phenotype more info
enables stearoyl-[ACP] desaturase activity	IEA Inferred from Electronic Annotation more info
enables stearoyl-[ACP] desaturase activity	IMP Inferred from Mutant Phenotype more info	PubMed

Process	Evidence Code	Pubs
acts_upstream_of_or_within defense response	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within defense response to bacterium	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within defense response to insect	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within defense response to virus	IEP Inferred from Expression Pattern more info	PubMed
acts_upstream_of_or_within defense response to virus	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within fatty acid metabolic process	IDA Inferred from Direct Assay more info	PubMed
acts_upstream_of_or_within fatty acid metabolic process	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within jasmonic acid biosynthetic process	TAS Traceable Author Statement more info	PubMed
acts_upstream_of_or_within lipid biosynthetic process	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within regulation of jasmonic acid mediated signaling pathway	TAS Traceable Author Statement more info	PubMed
acts_upstream_of_or_within regulation of salicylic acid mediated signaling pathway	TAS Traceable Author Statement more info	PubMed
acts_upstream_of_or_within unsaturated fatty acid biosynthetic process	TAS Traceable Author Statement more info	PubMed

Component	Evidence Code	Pubs
located_in chloroplast	HDA more info	PubMed
located_in chloroplast	ISM Inferred from Sequence Model more info
located_in chloroplast stroma	HDA more info	PubMed
located_in chloroplast thylakoid	HDA more info	PubMed
located_in plastid	TAS Traceable Author Statement more info	PubMed

General protein information

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Preferred Names: Plant stearoyl-acyl-carrier-protein desaturase family protein

NP_181899.1

SSI2; FUNCTIONS IN: acyl-[acyl-carrier-protein] desaturase activity, stearoyl-CoA 9-desaturase activity; INVOLVED IN: in 10 processes; LOCATED IN: chloroplast, chloroplast stroma, plastid; EXPRESSED IN: 22 plant structures; EXPRESSED DURING: 15 growth stages; CONTAINS InterPro DOMAIN/s: Ribonucleotide reductase-related (InterPro:IPR012348), Ferritin/ribonucleotide reductase-like (InterPro:IPR009078), Fatty acid desaturase, type 2 (InterPro:IPR005067), Stearoyl-ACP desaturase, conserved site (InterPro:IPR005803); BEST Arabidopsis thaliana protein match is: Plant stearoyl-acyl-carrier-protein desaturase family protein (TAIR:AT3G02630.1); Has 948 Blast hits to 940 proteins in 221 species: Archae - 0; Bacteria - 436; Metazoa - 2; Fungi - 0; Plants - 452; Viruses - 0; Other Eukaryotes - 58 (source: NCBI BLink).

NP_850400.1

SSI2; FUNCTIONS IN: acyl-[acyl-carrier-protein] desaturase activity, stearoyl-CoA 9-desaturase activity; INVOLVED IN: in 10 processes; LOCATED IN: chloroplast, plastid; EXPRESSED IN: 22 plant structures; EXPRESSED DURING: 15 growth stages; CONTAINS InterPro DOMAIN/s: Ribonucleotide reductase-related (InterPro:IPR012348), Ferritin/ribonucleotide reductase-like (InterPro:IPR009078), Fatty acid desaturase, type 2 (InterPro:IPR005067), Stearoyl-ACP desaturase, conserved site (InterPro:IPR005803); BEST Arabidopsis thaliana protein match is: Plant stearoyl-acyl-carrier-protein desaturase family protein (TAIR:AT3G02630.1); Has 946 Blast hits to 938 proteins in 221 species: Archae - 0; Bacteria - 436; Metazoa - 2; Fungi - 0; Plants - 450; Viruses - 0; Other Eukaryotes - 58 (source: NCBI BLink).

NCBI Reference Sequences (RefSeq)

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Genome Annotation

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference assembly

Genomic

NC_003071.7 Reference assembly

Range

18119873..18122889

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GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

NM_129933.4 → NP_181899.1 Plant stearoyl-acyl-carrier-protein desaturase family protein [Arabidopsis thaliana]

See identical proteins and their annotated locations for NP_181899.1

Status: REVIEWED

UniProtKB/Swiss-Prot

O22832, Q0WKW6, Q42591, Q94AE9

UniProtKB/TrEMBL

A0A178VWD8, A0A5S9X6Q9

Conserved Domains (1) summary

PLN00179
Location:3 → 401

PLN00179; acyl- [acyl-carrier protein] desaturase
NM_180069.1 → NP_850400.1 Plant stearoyl-acyl-carrier-protein desaturase family protein [Arabidopsis thaliana]

See identical proteins and their annotated locations for NP_850400.1

Status: REVIEWED

UniProtKB/TrEMBL

A0A178VWD8, A0A5S9X6Q9, F4IS32

Conserved Domains (1) summary

PLN00179
Location:3 → 401

PLN00179; acyl- [acyl-carrier protein] desaturase