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UniProtKB - P21888 (SYC_ECOLI)

Entry version 178 (23 Feb 2022)
Sequence version 2 (01 May 1992)
Previous versions | rss
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Protein

Cysteine--tRNA ligase

Gene

cysS

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

<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

Zn2+Note: Binds 1 zinc ion per subunit.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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 bindingi28ZincCombined sources1 Publication1
Metal bindingi209ZincCombined sources1 Publication1
Metal bindingi234ZincCombined sources1 Publication1
Metal bindingi238ZincCombined sources1 Publication1
<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 sitei269ATPBy 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

Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<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 functionAminoacyl-tRNA synthetase, Ligase
Biological processProtein biosynthesis
LigandATP-binding, Metal-binding, Nucleotide-binding, Zinc

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...BioCyci		EcoCyc:CYSS-MONOMER

BRENDA Comprehensive Enzyme Information System

More...BRENDAi		6.1.1.16, 2026

SABIO-RK: Biochemical Reaction Kinetics Database

More...SABIO-RKi		P21888

<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:
Cysteine--tRNA ligase (EC:6.1.1.16)
Alternative name(s):
Cysteinyl-tRNA synthetase
Short name:
CysRS
<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:cysS
Ordered Locus Names:b0526, JW0515
<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>OrganismiEscherichia coli (strain K12)
<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 identifieri83333 [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 lineageiBacteria › Proteobacteria › Gammaproteobacteria › Enterobacterales › Enterobacteriaceae › Escherichia ›
<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
  • UP000000318 <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
  • 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

Keywords - Cellular componenti

Cytoplasm

<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_00001593941 – 461Cysteine--tRNA ligaseAdd BLAST461

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...jPOSTi		P21888

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

More...PaxDbi		P21888

PRoteomics IDEntifications database

More...PRIDEi		P21888

<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

Monomer.

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		4262015, 50 interactors

Protein interaction database and analysis system

More...IntActi		P21888, 3 interactors

STRING: functional protein association networks

More...STRINGi		511145.b0526

<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

Secondary structure

1461
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

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

More...SMRi		P21888

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...EvolutionaryTracei		P21888

<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

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi30 – 40'HIGH' regionAdd BLAST11
Motifi266 – 270'KMSKS' region5

<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 class-I aminoacyl-tRNA synthetase family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		COG0215, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_013528_0_1_6

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P21888

Database for complete collections of gene phylogenies

More...PhylomeDBi		P21888

Family and domain databases

Conserved Domains Database

More...CDDi		cd00672, CysRS_core, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...Gene3Di		3.40.50.620, 1 hit

HAMAP database of protein families

More...HAMAPi		MF_00041, Cys_tRNA_synth, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR015803, Cys-tRNA-ligase
IPR015273, Cys-tRNA-synt_Ia_DALR
IPR024909, Cys-tRNA/MSH_ligase
IPR014729, Rossmann-like_a/b/a_fold
IPR032678, tRNA-synt_1_cat_dom
IPR009080, tRNAsynth_Ia_anticodon-bd

The PANTHER Classification System

More...PANTHERi		PTHR10890, PTHR10890, 1 hit

Pfam protein domain database

More...Pfami		View protein in Pfam
PF09190, DALR_2, 1 hit
PF01406, tRNA-synt_1e, 1 hit

Protein Motif fingerprint database; a protein domain database

More...PRINTSi		PR00983, TRNASYNTHCYS

Simple Modular Architecture Research Tool; a protein domain database

More...SMARTi		View protein in SMART
SM00840, DALR_2, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF47323, SSF47323, 1 hit

TIGRFAMs; a protein family database

More...TIGRFAMsi		TIGR00435, cysS, 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.

P21888-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MLKIFNTLTR QKEEFKPIHA GEVGMYVCGI TVYDLCHIGH GRTFVAFDVV 
        60         70         80         90        100
ARYLRFLGYK LKYVRNITDI DDKIIKRANE NGESFVAMVD RMIAEMHKDF 
       110        120        130        140        150
DALNILRPDM EPRATHHIAE IIELTEQLIA KGHAYVADNG DVMFDVPTDP 
       160        170        180        190        200
TYGVLSRQDL DQLQAGARVD VVDDKRNPMD FVLWKMSKEG EPSWPSPWGA 
       210        220        230        240        250
GRPGWHIECS AMNCKQLGNH FDIHGGGSDL MFPHHENEIA QSTCAHDGQY 
       260        270        280        290        300
VNYWMHSGMV MVDREKMSKS LGNFFTVRDV LKYYDAETVR YFLMSGHYRS 
       310        320        330        340        350
QLNYSEENLK QARAALERLY TALRGTDKTV APAGGEAFEA RFIEAMDDDF 
       360        370        380        390        400
NTPEAYSVLF DMAREVNRLK AEDMAAANAM ASHLRKLSAV LGLLEQEPEA 
       410        420        430        440        450
FLQSGAQADD SEVAEIEALI QQRLDARKAK DWAAADAARD RLNEMGIVLE 
       460 
DGPQGTTWRR K
Length:461
Mass (Da):52,202
Last modified:May 1, 1992 - 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:i2FA77FDBB7C5BA99
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 conflicti316L → V in CAA39691 (PubMed:2014166).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
X56234 Genomic DNA Translation: CAA39691.1
M59381 Genomic DNA Translation: AAA23658.1
X59293 Genomic DNA Translation: CAA41983.1
U82664 Genomic DNA Translation: AAB40279.1
U00096 Genomic DNA Translation: AAC73628.1
AP009048 Genomic DNA Translation: BAE76303.1

Protein sequence database of the Protein Information Resource

More...PIRi		A37868, YYEC

NCBI Reference Sequences

More...RefSeqi		NP_415059.1, NC_000913.3
WP_000912385.1, NZ_SSZK01000024.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...EnsemblBacteriai		AAC73628; AAC73628; b0526
BAE76303; BAE76303; BAE76303

Database of genes from NCBI RefSeq genomes

More...GeneIDi		946969

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		ecj:JW0515
eco:b0526

Pathosystems Resource Integration Center (PATRIC)

More...PATRICi		fig|1411691.4.peg.1752

<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
X56234 Genomic DNA Translation: CAA39691.1
M59381 Genomic DNA Translation: AAA23658.1
X59293 Genomic DNA Translation: CAA41983.1
U82664 Genomic DNA Translation: AAB40279.1
U00096 Genomic DNA Translation: AAC73628.1
AP009048 Genomic DNA Translation: BAE76303.1
PIRiA37868, YYEC
RefSeqiNP_415059.1, NC_000913.3
WP_000912385.1, NZ_SSZK01000024.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...PDBei

Protein Data Bank RCSB

More...RCSB PDBi

Protein Data Bank Japan

More...PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1LI5X-ray2.30A/B1-461[»]
1LI7X-ray2.60A/B1-461[»]
1U0BX-ray2.30B1-461[»]
SMRiP21888
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi4262015, 50 interactors
IntActiP21888, 3 interactors
STRINGi511145.b0526

Proteomic databases

jPOSTiP21888
PaxDbiP21888
PRIDEiP21888

Genome annotation databases

EnsemblBacteriaiAAC73628; AAC73628; b0526
BAE76303; BAE76303; BAE76303
GeneIDi946969
KEGGiecj:JW0515
eco:b0526
PATRICifig|1411691.4.peg.1752

Organism-specific databases

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

More...EchoBASEi		EB0193

Phylogenomic databases

eggNOGiCOG0215, Bacteria
HOGENOMiCLU_013528_0_1_6
InParanoidiP21888
PhylomeDBiP21888

Enzyme and pathway databases

BioCyciEcoCyc:CYSS-MONOMER
BRENDAi6.1.1.16, 2026
SABIO-RKiP21888

Miscellaneous databases

EvolutionaryTraceiP21888

Protein Ontology

More...PROi		PR:P21888

Family and domain databases

CDDicd00672, CysRS_core, 1 hit
Gene3Di3.40.50.620, 1 hit
HAMAPiMF_00041, Cys_tRNA_synth, 1 hit
InterProiView protein in InterPro
IPR015803, Cys-tRNA-ligase
IPR015273, Cys-tRNA-synt_Ia_DALR
IPR024909, Cys-tRNA/MSH_ligase
IPR014729, Rossmann-like_a/b/a_fold
IPR032678, tRNA-synt_1_cat_dom
IPR009080, tRNAsynth_Ia_anticodon-bd
PANTHERiPTHR10890, PTHR10890, 1 hit
PfamiView protein in Pfam
PF09190, DALR_2, 1 hit
PF01406, tRNA-synt_1e, 1 hit
PRINTSiPR00983, TRNASYNTHCYS
SMARTiView protein in SMART
SM00840, DALR_2, 1 hit
SUPFAMiSSF47323, SSF47323, 1 hit
TIGRFAMsiTIGR00435, cysS, 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 nameiSYC_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: P21888
Secondary accession number(s): Q2MBQ3
<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: May 1, 1991
Last sequence update: May 1, 1992
Last modified: February 23, 2022
This is version 178 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

3D-structure, Direct protein sequencing, Reference proteome

Documents

  1. Aminoacyl-tRNA synthetases
    List of aminoacyl-tRNA synthetase entries
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. SIMILARITY comments
    Index of protein domains and families
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