Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Acetolactate synthase small subunit

Gene

ilvH

Organism
Synechocystis sp. (strain PCC 6803 / Kazusa)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalytic activityi

2 pyruvate = 2-acetolactate + CO2.

Pathwayi: L-isoleucine biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes L-isoleucine from 2-oxobutanoate.
Proteins known to be involved in the 4 steps of the subpathway in this organism are:
  1. Acetolactate synthase small subunit (ilvH), Acetolactate synthase (ilvG)
  2. Ketol-acid reductoisomerase (NADP(+)) (ilvC)
  3. Dihydroxy-acid dehydratase (ilvD)
  4. Probable branched-chain-amino-acid aminotransferase (ilvE)
This subpathway is part of the pathway L-isoleucine biosynthesis, which is itself part of Amino-acid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes L-isoleucine from 2-oxobutanoate, the pathway L-isoleucine biosynthesis and in Amino-acid biosynthesis.

Pathwayi: L-valine biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes L-valine from pyruvate.
Proteins known to be involved in the 4 steps of the subpathway in this organism are:
  1. Acetolactate synthase small subunit (ilvH), Acetolactate synthase (ilvG)
  2. Ketol-acid reductoisomerase (NADP(+)) (ilvC)
  3. Dihydroxy-acid dehydratase (ilvD)
  4. Probable branched-chain-amino-acid aminotransferase (ilvE)
This subpathway is part of the pathway L-valine biosynthesis, which is itself part of Amino-acid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes L-valine from pyruvate, the pathway L-valine biosynthesis and in Amino-acid biosynthesis.

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Transferase

Keywords - Biological processi

Amino-acid biosynthesis, Branched-chain amino acid biosynthesis

Enzyme and pathway databases

UniPathwayiUPA00047; UER00055.
UPA00049; UER00059.

Names & Taxonomyi

Protein namesi
Recommended name:
Acetolactate synthase small subunit (EC:2.2.1.6)
Alternative name(s):
Acetohydroxy-acid synthase small subunit
Short name:
AHAS
Short name:
ALS
Gene namesi
Name:ilvH
Synonyms:ilvN
Ordered Locus Names:sll0065
OrganismiSynechocystis sp. (strain PCC 6803 / Kazusa)
Taxonomic identifieri1111708 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesMerismopediaceaeSynechocystis
Proteomesi
  • UP000001425 Componenti: Chromosome

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001514181 – 172Acetolactate synthase small subunitAdd BLAST172

Proteomic databases

PRIDEiQ55141.

Interactioni

Subunit structurei

Dimer of large and small chains.By similarity

Protein-protein interaction databases

IntActiQ55141. 2 interactors.

Structurei

3D structure databases

ProteinModelPortaliQ55141.
SMRiQ55141.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini4 – 78ACTPROSITE-ProRule annotationAdd BLAST75

Sequence similaritiesi

Contains 1 ACT domain.PROSITE-ProRule annotation

Phylogenomic databases

HOGENOMiHOG000046747.
InParanoidiQ55141.
KOiK01653.
OMAiPYGIREI.
PhylomeDBiQ55141.

Family and domain databases

InterProiIPR004789. Acetalactate_synth_ssu.
IPR019455. Acetolactate_synth_ssu_C.
IPR002912. ACT_dom.
[Graphical view]
PfamiPF10369. ALS_ss_C. 1 hit.
[Graphical view]
TIGRFAMsiTIGR00119. acolac_sm. 1 hit.
PROSITEiPS51671. ACT. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q55141-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKHTLSVLVE DEAGVLTRIA GLFARRGFNI ESLAVGSAEQ GDVSRITMVV
60 70 80 90 100
PGDENTIEQL TKQLYKLVNV IKVQDITETP CVERELMLVK VSANAPNRAE
110 120 130 140 150
VIELAQVFRA RIVDISEDTV TIEVVGDPGK MVAILQMLAK FGIKEVARTG
160 170
KIALVRESGV NTEYLKSLES KF
Length:172
Mass (Da):18,871
Last modified:May 30, 2000 - v2
Checksum:iCF266998F9BCA806
GO

Sequence cautioni

The sequence BAA10276 differs from that shown. Reason: Erroneous initiation.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000022 Genomic DNA. Translation: BAA10276.1. Different initiation.
PIRiS74358.

Genome annotation databases

EnsemblBacteriaiBAA10276; BAA10276; BAA10276.
KEGGisyn:sll0065.
PATRICi23842034. VBISynSp132158_2559.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000022 Genomic DNA. Translation: BAA10276.1. Different initiation.
PIRiS74358.

3D structure databases

ProteinModelPortaliQ55141.
SMRiQ55141.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

IntActiQ55141. 2 interactors.

Proteomic databases

PRIDEiQ55141.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAA10276; BAA10276; BAA10276.
KEGGisyn:sll0065.
PATRICi23842034. VBISynSp132158_2559.

Phylogenomic databases

HOGENOMiHOG000046747.
InParanoidiQ55141.
KOiK01653.
OMAiPYGIREI.
PhylomeDBiQ55141.

Enzyme and pathway databases

UniPathwayiUPA00047; UER00055.
UPA00049; UER00059.

Family and domain databases

InterProiIPR004789. Acetalactate_synth_ssu.
IPR019455. Acetolactate_synth_ssu_C.
IPR002912. ACT_dom.
[Graphical view]
PfamiPF10369. ALS_ss_C. 1 hit.
[Graphical view]
TIGRFAMsiTIGR00119. acolac_sm. 1 hit.
PROSITEiPS51671. ACT. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiILVH_SYNY3
AccessioniPrimary (citable) accession number: Q55141
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 30, 2000
Last sequence update: May 30, 2000
Last modified: November 2, 2016
This is version 107 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
  3. Synechocystis PCC 6803
    Synechocystis (strain PCC 6803): entries and gene names

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.