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Entry version 141 (02 Dec 2020)
Sequence version 2 (26 Sep 2001)
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Protein

Acetolactate synthase large subunit

Gene

ilvB

Organism
Lactococcus lactis subsp. lactis (strain IL1403) (Streptococcus lactis)
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Miscellaneous

Contains 1 molecule of FAD per monomer. The role of this cofactor is not clear considering that the reaction does not involve redox chemistry (By similarity).By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the 'Function' section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

Protein has several cofactor binding sites:

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: L-isoleucine biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes L-isoleucine from 2-oxobutanoate. 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. 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.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei57Thiamine pyrophosphateBy similarity1
Binding sitei159FADBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi446MagnesiumBy similarity1
Metal bindingi473MagnesiumBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi265 – 286FADBy similarityAdd BLAST22
Nucleotide bindingi308 – 327FADBy similarityAdd BLAST20

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionTransferase
Biological processAmino-acid biosynthesis, Branched-chain amino acid biosynthesis
LigandFAD, Flavoprotein, Magnesium, Metal-binding, Thiamine pyrophosphate

Enzyme and pathway databases

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00047;UER00055
UPA00049;UER00059

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Acetolactate synthase large subunit (EC:2.2.1.6)
Short name:
AHAS
Alternative name(s):
Acetohydroxy-acid synthase large subunit
Short name:
ALS
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:ilvB
Ordered Locus Names:LL1224
ORF Names:L0078
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiLactococcus lactis subsp. lactis (strain IL1403) (Streptococcus lactis)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri272623 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeLactococcus
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000002196 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00000907851 – 575Acetolactate synthase large subunitAdd BLAST575

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q02137

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Dimer of large and small chains.

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
272623.L0078

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q02137

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni395 – 475Thiamine pyrophosphate bindingAdd BLAST81

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the TPP enzyme family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0028, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_013748_1_2_9

Family and domain databases

Conserved Domains Database

More...
CDDi
cd02015, TPP_AHAS, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR012846, Acetolactate_synth_lsu
IPR039368, AHAS_TPP
IPR029035, DHS-like_NAD/FAD-binding_dom
IPR029061, THDP-binding
IPR012000, Thiamin_PyroP_enz_cen_dom
IPR012001, Thiamin_PyroP_enz_TPP-bd_dom
IPR000399, TPP-bd_CS
IPR011766, TPP_enzyme-bd_C

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF02775, TPP_enzyme_C, 1 hit
PF00205, TPP_enzyme_M, 1 hit
PF02776, TPP_enzyme_N, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF52467, SSF52467, 1 hit
SSF52518, SSF52518, 2 hits

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00118, acolac_lg, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00187, TPP_ENZYMES, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

Q02137-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MKKIKLEKPT SGSQLVLQTL KELGVEIIFG YPGGAMLPLY DAIHNFEGIQ
60 70 80 90 100
HILARHEQGA THEAEGYAKS SGKVGVVVVT SGPGATNAVT GIADAYLDSV
110 120 130 140 150
PLLVFTGQVG PLSIGKDAFQ EADTVGITAP ITKYNYQIRE TADIPRIVTE
160 170 180 190 200
AYYLARTGRP GPVEIDLPKD VSTLEVTEIN DPSLNLPHYH ESEKATDEQL
210 220 230 240 250
QELLTELSVS KKPVIIAGGG INYSGSVDIF RAFVEKYQIP VVSTLLGLGT
260 270 280 290 300
LPISHELQLG MAGMHGSYAA NMALVEADYI INLGSRFDDR VVSNPAKVAK
310 320 330 340 350
NAVVAHIDID AAELGKIVKT DIPILSDLKA ALSRLLQLNK VRTDFNDWIK
360 370 380 390 400
TVTKNKEKAP FTYEPQNHDI RPQETIKLIG EYTQGDAIIV TDVGQHQMWV
410 420 430 440 450
AQYYPYKNAR QLITSGGMGT MGFGIPAAIG AKLAQPNKNV IVFVGDGGFQ
460 470 480 490 500
MTNQELALLN GYGIAIKVVL INNHSLGMVR QWQESFYEER RSQSVFDVEP
510 520 530 540 550
NFQLLAEAYG IKHVKLDNPK TLADDLKIIT EDEPMLIEVL ISKSEHVLPM
560 570
IPAGLHSDEM IGLHFTDENE EVDNA
Length:575
Mass (Da):62,850
Last modified:September 26, 2001 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i2F7168C50409035F
GO

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence AAK05322 differs from that shown. Reason: Erroneous termination. Truncated C-terminus.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti111 – 112PL → RQ in AAB81919 (PubMed:1400210).Curated2
Sequence conflicti298V → F in AAB81919 (PubMed:1400210).Curated1
Sequence conflicti353 – 354TK → IE in AAB81919 (PubMed:1400210).Curated2
Sequence conflicti557S → N in AAB81919 (PubMed:1400210).Curated1
Sequence conflicti568E → K in AAB81919 (PubMed:1400210).Curated1
Sequence conflicti572V → I in AAB81919 (PubMed:1400210).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
U92974 Genomic DNA Translation: AAB81919.1
AE005176 Genomic DNA Translation: AAK05322.1 Sequence problems.

Protein sequence database of the Protein Information Resource

More...
PIRi
H86777
S35138

NCBI Reference Sequences

More...
RefSeqi
NP_267380.1, NC_002662.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAK05322; AAK05322; L0078

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
lla:L0078

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|272623.7.peg.1323

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U92974 Genomic DNA Translation: AAB81919.1
AE005176 Genomic DNA Translation: AAK05322.1 Sequence problems.
PIRiH86777
S35138
RefSeqiNP_267380.1, NC_002662.1

3D structure databases

SMRiQ02137
ModBaseiSearch...

Protein-protein interaction databases

STRINGi272623.L0078

Proteomic databases

PaxDbiQ02137

Genome annotation databases

EnsemblBacteriaiAAK05322; AAK05322; L0078
KEGGilla:L0078
PATRICifig|272623.7.peg.1323

Phylogenomic databases

eggNOGiCOG0028, Bacteria
HOGENOMiCLU_013748_1_2_9

Enzyme and pathway databases

UniPathwayiUPA00047;UER00055
UPA00049;UER00059

Family and domain databases

CDDicd02015, TPP_AHAS, 1 hit
InterProiView protein in InterPro
IPR012846, Acetolactate_synth_lsu
IPR039368, AHAS_TPP
IPR029035, DHS-like_NAD/FAD-binding_dom
IPR029061, THDP-binding
IPR012000, Thiamin_PyroP_enz_cen_dom
IPR012001, Thiamin_PyroP_enz_TPP-bd_dom
IPR000399, TPP-bd_CS
IPR011766, TPP_enzyme-bd_C
PfamiView protein in Pfam
PF02775, TPP_enzyme_C, 1 hit
PF00205, TPP_enzyme_M, 1 hit
PF02776, TPP_enzyme_N, 1 hit
SUPFAMiSSF52467, SSF52467, 1 hit
SSF52518, SSF52518, 2 hits
TIGRFAMsiTIGR00118, acolac_lg, 1 hit
PROSITEiView protein in PROSITE
PS00187, TPP_ENZYMES, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiILVB_LACLA
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q02137
Secondary accession number(s): Q9CG84
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 1, 1993
Last sequence update: September 26, 2001
Last modified: December 2, 2020
This is version 141 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
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