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Entry version 109 (02 Jun 2021)
Sequence version 1 (21 Dec 2004)
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Protein

Peptide chain release factor RF2

Gene

prfB

Organism
Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
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>
-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

Peptide chain release factor 2 directs the termination of translation in response to the peptide chain termination codons UGA and UAA (Probable). In endogenous ribosomes interacts with P-site tRNA and 23S rRNA (PubMed:18988853, PubMed:20421507).

In the presence of truncated mRNA in the 70S ribosome, ArfA and RF2 interact such that the GGQ peptide hydrolysis motif of RF2 rises into the peptidyl-transferase center and releases the ribosome (By similarity).

Recruited to stalled E.coli 70S ribosomes by E.coli ArfA, but cannot be functionally accomodated in the peptidyl-transferase center (PubMed:27934701, PubMed:28077875).

Note T.thermophilus probably does not encode arfA (Ref. 1).

By similarity2 Publications4 Publications

<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

<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 functionRNA-binding, rRNA-binding, tRNA-binding
Biological processProtein biosynthesis

<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:
Peptide chain release factor RF2
<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:prfB
Ordered Locus Names:TTHA0142
<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>OrganismiThermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
<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 identifieri300852 [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 lineageiBacteriaDeinococcus-ThermusDeinococciThermalesThermaceaeThermus
<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
  • UP000000532 <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 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_00004397551 – 378Peptide chain release factor RF2Add BLAST378

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei253N5-methylglutamine1 Publication1

Keywords - PTMi

Methylation

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
Q5SM01

<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

Interacts with the ribosome (PubMed:16377566, PubMed:17272297, PubMed:18988853, PubMed:20421507).

Interacts with ribosomal protein L11 (PubMed:18988853). Recruited to stalled E.coli ribosomes by E.coli ArfA (PubMed:27934701, PubMed:28077875).

1 Publication5 Publications

Protein-protein interaction databases

Protein interaction database and analysis system

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IntActi
Q5SM01, 51 interactors

STRING: functional protein association networks

More...
STRINGi
300852.55771524

<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

1378
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

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SMRi
Q5SM01

Database of comparative protein structure models

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ModBasei
Search...

Protein Data Bank in Europe - Knowledge Base

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PDBe-KBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...
EvolutionaryTracei
Q5SM01

<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

<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

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eggNOGi
COG1186, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_036856_6_0_0

Identification of Orthologs from Complete Genome Data

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OMAi
YVFHPYQ

Database for complete collections of gene phylogenies

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PhylomeDBi
Q5SM01

Family and domain databases

HAMAP database of protein families

More...
HAMAPi
MF_00094, Rel_fac_2, 1 hit

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR005139, PCRF
IPR000352, Pep_chain_release_fac_I
IPR004374, PrfB

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF03462, PCRF, 1 hit
PF00472, RF-1, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

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SMARTi
View protein in SMART
SM00937, PCRF, 1 hit

TIGRFAMs; a protein family database

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TIGRFAMsi
TIGR00020, prfB, 1 hit

PROSITE; a protein domain and family database

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PROSITEi
View protein in PROSITE
PS00745, RF_PROK_I, 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.

Q5SM01-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MRLASQSAIL VKVWTWNASR NAWKASGGIF DIPQKETRLK ELERRLEDPS
60 70 80 90 100
LWNDPEAARK VSQEAARLRR TVDTFRSLES DLQGLLELME ELPAEEREAL
110 120 130 140 150
KPELEEAAKK LDELYHQTLL NFPHAEKNAI LTIQPGAGGT EACDWAEMLL
160 170 180 190 200
RMYTRFAERQ GFQVEVVDLT PGPEAGIDYA QILVKGENAY GLLSPEAGVH
210 220 230 240 250
RLVRPSPFDA SGRRHTSFAG VEVIPEVDEE VEVVLKPEEL RIDVMRASGP
260 270 280 290 300
GGQGVNTTDS AVRVVHLPTG ITVTCQTTRS QIKNKELALK ILKARLYELE
310 320 330 340 350
RKKREEELKA LRGEVRPIEW GSQIRSYVLD KNYVKDHRTG LMRHDPENVL
360 370
DGDLMDLIWA GLEWKAGRRQ GTEEVEAE
Length:378
Mass (Da):42,734
Last modified:December 21, 2004 - v1
<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:i55B4AC9C891AEEB7
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

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DDBJi
Links Updated
AP008226 Genomic DNA Translation: BAD69965.1

NCBI Reference Sequences

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RefSeqi
YP_143408.1, NC_006461.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
BAD69965; BAD69965; BAD69965

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ttj:TTHA0142

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|300852.9.peg.140

<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
AP008226 Genomic DNA Translation: BAD69965.1
RefSeqiYP_143408.1, NC_006461.1

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
2IHRX-ray2.50127-378[»]
4V4SX-ray6.76AY28-378[»]
4V5EX-ray3.45AY/CY31-369[»]
4V5JX-ray3.10AY/CY31-369[»]
5MDYelectron microscopy3.3571-378[»]
SMRiQ5SM01
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

IntActiQ5SM01, 51 interactors
STRINGi300852.55771524

PTM databases

iPTMnetiQ5SM01

Genome annotation databases

EnsemblBacteriaiBAD69965; BAD69965; BAD69965
KEGGittj:TTHA0142
PATRICifig|300852.9.peg.140

Phylogenomic databases

eggNOGiCOG1186, Bacteria
HOGENOMiCLU_036856_6_0_0
OMAiYVFHPYQ
PhylomeDBiQ5SM01

Miscellaneous databases

EvolutionaryTraceiQ5SM01

Family and domain databases

HAMAPiMF_00094, Rel_fac_2, 1 hit
InterProiView protein in InterPro
IPR005139, PCRF
IPR000352, Pep_chain_release_fac_I
IPR004374, PrfB
PfamiView protein in Pfam
PF03462, PCRF, 1 hit
PF00472, RF-1, 1 hit
SMARTiView protein in SMART
SM00937, PCRF, 1 hit
TIGRFAMsiTIGR00020, prfB, 1 hit
PROSITEiView protein in PROSITE
PS00745, RF_PROK_I, 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 nameiRF2_THET8
<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: Q5SM01
<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 10, 2017
Last sequence update: December 21, 2004
Last modified: June 2, 2021
This is version 109 of the entry and version 1 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, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
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