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Entry version 154 (02 Dec 2020)
Sequence version 2 (01 Nov 1997)
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Protein

2-methylcitrate synthase

Gene

prpC

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score:

Annotation score:5 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>
-Experimental evidence at protein leveli <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

Involved in the catabolism of short chain fatty acids (SCFA) via the tricarboxylic acid (TCA)(acetyl degradation route) and via the 2-methylcitrate cycle I (propionate degradation route). Catalyzes the Claisen condensation of propionyl-CoA and oxaloacetate (OAA) to yield 2-methylcitrate (2-MC) and CoA. Also catalyzes the condensation of oxaloacetate with acetyl-CoA to yield citrate but with a lower specificity.

5 Publications

Caution

There is uncertainty concerning the 2-methylcitrate stereochemistry. Brock et al. report a (2S,3S) stereochemistry, but Reddick et al. determined that the 2-methylcitrate has either (2S,3R) or (2R,3S) stereochemistry.2 Publications

<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 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

  1. KM=5 µM for oxaloacetate (at pH 8 and 35 degrees Celsius)1 Publication
  2. KM=17 µM for propionyl-CoA (at pH 7.4)1 Publication
  3. KM=37 µM for propionyl-CoA (at pH 8 and 35 degrees Celsius)1 Publication
  4. KM=101 µM for acetyl-CoA (at pH 8 and 35 degrees Celsius)1 Publication
  1. Vmax=0.11 µmol/min/mg enzyme with acetyl-CoA as substrate (at pH 8 and 35 degrees Celsius)1 Publication
  2. Vmax=0.33 µmol/min/mg enzyme with propionyl-CoA as substrate (at pH 8 and 35 degrees Celsius)1 Publication

pH dependencei

Optimum pH is 9.1 Publication

Temperature dependencei

Optimum temperature is between 45 and 50 degrees Celsius.1 Publication

<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: propanoate degradation

This protein is involved in the pathway propanoate degradation, which is part of Organic acid metabolism.1 Publication
View all proteins of this organism that are known to be involved in the pathway propanoate degradation and in Organic acid metabolism.

Pathwayi: tricarboxylic acid cycle

This protein is involved in step 1 of the subpathway that synthesizes isocitrate from oxaloacetate.1 Publication This subpathway is part of the pathway tricarboxylic acid cycle, which is itself part of Carbohydrate metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes isocitrate from oxaloacetate, the pathway tricarboxylic acid cycle and in Carbohydrate metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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 sitei82SubstrateBy similarity1
Binding sitei200SubstrateBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei235By similarity1
Active sitei274By similarity1
Binding sitei283SubstrateBy similarity1
Active sitei325By similarity1
Binding sitei350SubstrateBy similarity1
Binding sitei369SubstrateBy similarity1

<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 processTricarboxylic acid cycle

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:G6198-MONOMER
MetaCyc:G6198-MONOMER

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
2.3.3.5, 2026

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

More...
UniPathwayi
UPA00223;UER00717
UPA00946

<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-methylcitrate synthase1 Publication (EC:2.3.3.53 Publications)
Short name:
2-MCS1 Publication
Short name:
MCS1 Publication
Alternative name(s):
(2S,3S)-2-methylcitrate synthase1 Publication
Citrate synthase1 Publication (EC:2.3.3.162 Publications)
<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:prpC1 Publication
Synonyms:yahS, yzzD
Ordered Locus Names:b0333, JW0324
<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>OrganismiEscherichia coli (strain K12)
<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 identifieri83333 [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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<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
  • UP000000318 <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
  • UP000000625 Componenti: Chromosome

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

<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_00001699811 – 3892-methylcitrate synthaseAdd BLAST389

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
P31660

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

More...
PaxDbi
P31660

PRoteomics IDEntifications database

More...
PRIDEi
P31660

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

By propionate, but not acetate or glucose. Expression of prpBCDE operon is regulated by PrpR, CRP and a variety of sugars such as arabinose, galactose, glucose mannose and xylose.5 Publications

<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

Homodimer.

1 Publication

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
4259809, 8 interactors

Database of interacting proteins

More...
DIPi
DIP-10579N

Protein interaction database and analysis system

More...
IntActi
P31660, 2 interactors

STRING: functional protein association networks

More...
STRINGi
511145.b0333

<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
P31660

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>Regioni268 – 272Coenzyme A bindingBy similarity5

<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 citrate synthase family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0372, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_025068_2_1_6

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P31660

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P31660

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.230.10, 1 hit
1.10.580.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR011278, 2-MeCitrate/Citrate_synth_II
IPR016142, Citrate_synth-like_lrg_a-sub
IPR016143, Citrate_synth-like_sm_a-sub
IPR002020, Citrate_synthase
IPR019810, Citrate_synthase_AS
IPR024176, Citrate_synthase_bac-typ
IPR036969, Citrate_synthase_sf

The PANTHER Classification System

More...
PANTHERi
PTHR11739, PTHR11739, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00285, Citrate_synt, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF001369, Citrate_synth, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00143, CITRTSNTHASE

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF48256, SSF48256, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR01800, cit_synth_II, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00480, CITRATE_SYNTHASE, 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.

P31660-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSDTTILQNS THVIKPKKSV ALSGVPAGNT ALCTVGKSGN DLHYRGYDIL
60 70 80 90 100
DLAKHCEFEE VAHLLIHGKL PTRDELAAYK TKLKALRGLP ANVRTVLEAL
110 120 130 140 150
PAASHPMDVM RTGVSALGCT LPEKEGHTVS GARDIADKLL ASLSSILLYW
160 170 180 190 200
YHYSHNGERI QPETDDDSIG GHFLHLLHGE KPSQSWEKAM HISLVLYAEH
210 220 230 240 250
EFNASTFTSR VIAGTGSDMY SAIIGAIGAL RGPKHGGANE VSLEIQQRYE
260 270 280 290 300
TPDEAEADIR KRVENKEVVI GFGHPVYTIA DPRHQVIKRV AKQLSQEGGS
310 320 330 340 350
LKMYNIADRL ETVMWESKKM FPNLDWFSAV SYNMMGVPTE MFTPLFVIAR
360 370 380
VTGWAAHIIE QRQDNKIIRP SANYVGPEDR PFVALDKRQ
Length:389
Mass (Da):43,102
Last modified:November 1, 1997 - 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:i02B779E7AD4581C3
GO

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
U73857 Genomic DNA Translation: AAB18057.1
U00096 Genomic DNA Translation: AAC73436.1
AP009048 Genomic DNA Translation: BAE76115.1

Protein sequence database of the Protein Information Resource

More...
PIRi
E64760

NCBI Reference Sequences

More...
RefSeqi
NP_414867.1, NC_000913.3
WP_001285927.1, NZ_SSZK01000063.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC73436; AAC73436; b0333
BAE76115; BAE76115; BAE76115

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
947528

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW0324
eco:b0333

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|1411691.4.peg.1944

<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
U73857 Genomic DNA Translation: AAB18057.1
U00096 Genomic DNA Translation: AAC73436.1
AP009048 Genomic DNA Translation: BAE76115.1
PIRiE64760
RefSeqiNP_414867.1, NC_000913.3
WP_001285927.1, NZ_SSZK01000063.1

3D structure databases

SMRiP31660
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi4259809, 8 interactors
DIPiDIP-10579N
IntActiP31660, 2 interactors
STRINGi511145.b0333

Proteomic databases

jPOSTiP31660
PaxDbiP31660
PRIDEiP31660

Genome annotation databases

EnsemblBacteriaiAAC73436; AAC73436; b0333
BAE76115; BAE76115; BAE76115
GeneIDi947528
KEGGiecj:JW0324
eco:b0333
PATRICifig|1411691.4.peg.1944

Organism-specific databases

EchoBASE - an integrated post-genomic database for E. coli

More...
EchoBASEi
EB1706

Phylogenomic databases

eggNOGiCOG0372, Bacteria
HOGENOMiCLU_025068_2_1_6
InParanoidiP31660
PhylomeDBiP31660

Enzyme and pathway databases

UniPathwayiUPA00223;UER00717
UPA00946
BioCyciEcoCyc:G6198-MONOMER
MetaCyc:G6198-MONOMER
BRENDAi2.3.3.5, 2026

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P31660

Family and domain databases

Gene3Di1.10.230.10, 1 hit
1.10.580.10, 1 hit
InterProiView protein in InterPro
IPR011278, 2-MeCitrate/Citrate_synth_II
IPR016142, Citrate_synth-like_lrg_a-sub
IPR016143, Citrate_synth-like_sm_a-sub
IPR002020, Citrate_synthase
IPR019810, Citrate_synthase_AS
IPR024176, Citrate_synthase_bac-typ
IPR036969, Citrate_synthase_sf
PANTHERiPTHR11739, PTHR11739, 1 hit
PfamiView protein in Pfam
PF00285, Citrate_synt, 1 hit
PIRSFiPIRSF001369, Citrate_synth, 1 hit
PRINTSiPR00143, CITRTSNTHASE
SUPFAMiSSF48256, SSF48256, 1 hit
TIGRFAMsiTIGR01800, cit_synth_II, 1 hit
PROSITEiView protein in PROSITE
PS00480, CITRATE_SYNTHASE, 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 nameiPRPC_ECOLI
<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: P31660
Secondary accession number(s): P77217, Q2MC91
<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: July 1, 1993
Last sequence update: November 1, 1997
Last modified: December 2, 2020
This is version 154 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

Direct protein sequencing, 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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