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Entry version 115 (11 Dec 2019)
Sequence version 2 (23 Jan 2002)
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Protein

2-isopropylmalate synthase

Gene

leuA

Organism
Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)
Status
Reviewed-Annotation score:

Annotation score:3 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

Catalyzes the condensation of the acetyl group of acetyl-CoA with 3-methyl-2-oxobutanoate (2-oxoisovalerate) to form 3-carboxy-3-hydroxy-4-methylpentanoate (2-isopropylmalate).

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

This protein is involved in step 1 of the subpathway that synthesizes L-leucine from 3-methyl-2-oxobutanoate.
Proteins known to be involved in the 4 steps of the subpathway in this organism are:
  1. 2-isopropylmalate synthase (leuA)
  2. 3-isopropylmalate dehydratase small subunit (leuD), 3-isopropylmalate dehydratase large subunit (leuC)
  3. 3-isopropylmalate dehydrogenase (leuB)
  4. no protein annotated in this organism
This subpathway is part of the pathway L-leucine 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-leucine from 3-methyl-2-oxobutanoate, the pathway L-leucine biosynthesis and in Amino-acid biosynthesis.

<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, Leucine biosynthesis

Enzyme and pathway databases

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

More...
UniPathwayi
UPA00048;UER00070

<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_and_taxonomy_section">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:
2-isopropylmalate synthase (EC:2.3.3.13)
Alternative name(s):
Alpha-IPM synthase
Alpha-isopropylmalate synthase
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:leuA
Ordered Locus Names:alr4840
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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>OrganismiNostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 identifieri103690 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 lineageiBacteriaCyanobacteriaNostocalesNostocaceaeNostoc
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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
  • UP000002483 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">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.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001403271 – 5312-isopropylmalate synthaseAdd BLAST531

Proteomic databases

PRoteomics IDEntifications database

More...
PRIDEi
P48575

<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_section">'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_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homotetramer.

By similarity

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
103690.17133977

<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

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SMRi
P48575

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

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini8 – 284Pyruvate carboxyltransferasePROSITE-ProRule annotationAdd BLAST277

<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

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105CYQ Bacteria
COG0119 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000046859

KEGG Orthology (KO)

More...
KOi
K01649

Identification of Orthologs from Complete Genome Data

More...
OMAi
IHMQYKL

Database of Orthologous Groups

More...
OrthoDBi
840579at2

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.20.20.70, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_01025 LeuA_type1, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR013709 2-isopropylmalate_synth_dimer
IPR002034 AIPM/Hcit_synth_CS
IPR013785 Aldolase_TIM
IPR036230 LeuA_allosteric_dom_sf
IPR005671 LeuA_bact_synth
IPR000891 PYR_CT

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00682 HMGL-like, 1 hit
PF08502 LeuA_dimer, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00917 LeuA_dimer, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF110921 SSF110921, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00973 leuA_bact, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00815 AIPM_HOMOCIT_SYNTH_1, 1 hit
PS00816 AIPM_HOMOCIT_SYNTH_2, 1 hit
PS50991 PYR_CT, 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_length">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_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

P48575-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MTTKPEKIII FDTTLRDGEQ CPGATLNIDE KLAIAKQLAR LGVDIIEAGF
60 70 80 90 100
AFASPGDFEA VHKIAQTVGT QSGPVICSLA RARHDDIKAA AEAIKPAAKG
110 120 130 140 150
RIHTFIATSD IHLQYKLKKT RPEVIAIAEE MVAYAKSFTD DVEFSPEDAG
160 170 180 190 200
RSDPEFLYQV LERAIAAGAT TINIPDTVGY TTPSEFGAII KGIKENVPNI
210 220 230 240 250
DQAIISVHGH NDLGLAVANF LEAVKNGARQ LECTINGIGE RAGNAALEEL
260 270 280 290 300
VMAMHVRRQY FNPFLGRHPD SEEALTNIDT KQIYKTSRLV SNLTGMLVQP
310 320 330 340 350
NKAIVGANAF AHESGIHQDG VLKNKLTYEI MDAQLIGLTD NQIVLGKHSG
360 370 380 390 400
RNAFRTRLKE LGFELSETEL NKAFVKFKEV ADKKKEISDW DLEAIVNDEI
410 420 430 440 450
QQAPDLFRVE LVQVSCGSNA RPTATVTLRT PDGEELTDAA IGTGPVDAVY
460 470 480 490 500
KAINRVVNVP NQLIEFSVQS VTAGIDAIGE VTIRLRYESR VFSGHAANTD
510 520 530
IIVASAQAYV NALNRLYASL QTQDKQTEVT A
Length:531
Mass (Da):57,762
Last modified:January 23, 2002 - 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:iD45ED65407D0967C
GO

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 conflicti416 – 423CGSNARPT → AVAMHVQP in CAA87005 (PubMed:9139910).Curated8

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
Z46907 Genomic DNA Translation: CAA87005.1
BA000019 Genomic DNA Translation: BAB76539.1

Protein sequence database of the Protein Information Resource

More...
PIRi
AH2410
S52294

NCBI Reference Sequences

More...
RefSeqi
WP_010998968.1, NZ_RSCN01000037.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
BAB76539; BAB76539; BAB76539

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ana:alr4840

<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
Z46907 Genomic DNA Translation: CAA87005.1
BA000019 Genomic DNA Translation: BAB76539.1
PIRiAH2410
S52294
RefSeqiWP_010998968.1, NZ_RSCN01000037.1

3D structure databases

SMRiP48575
ModBaseiSearch...

Protein-protein interaction databases

STRINGi103690.17133977

Proteomic databases

PRIDEiP48575

Genome annotation databases

EnsemblBacteriaiBAB76539; BAB76539; BAB76539
KEGGiana:alr4840

Phylogenomic databases

eggNOGiENOG4105CYQ Bacteria
COG0119 LUCA
HOGENOMiHOG000046859
KOiK01649
OMAiIHMQYKL
OrthoDBi840579at2

Enzyme and pathway databases

UniPathwayiUPA00048;UER00070

Family and domain databases

Gene3Di3.20.20.70, 1 hit
HAMAPiMF_01025 LeuA_type1, 1 hit
InterProiView protein in InterPro
IPR013709 2-isopropylmalate_synth_dimer
IPR002034 AIPM/Hcit_synth_CS
IPR013785 Aldolase_TIM
IPR036230 LeuA_allosteric_dom_sf
IPR005671 LeuA_bact_synth
IPR000891 PYR_CT
PfamiView protein in Pfam
PF00682 HMGL-like, 1 hit
PF08502 LeuA_dimer, 1 hit
SMARTiView protein in SMART
SM00917 LeuA_dimer, 1 hit
SUPFAMiSSF110921 SSF110921, 1 hit
TIGRFAMsiTIGR00973 leuA_bact, 1 hit
PROSITEiView protein in PROSITE
PS00815 AIPM_HOMOCIT_SYNTH_1, 1 hit
PS00816 AIPM_HOMOCIT_SYNTH_2, 1 hit
PS50991 PYR_CT, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiLEU1_NOSS1
<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: P48575
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 1, 1996
Last sequence update: January 23, 2002
Last modified: December 11, 2019
This is version 115 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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