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Entry version 109 (02 Jun 2021)
Sequence version 1 (01 Jun 2002)
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Protein

SsrA-binding protein

Gene

smpB

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

Required for rescue of stalled ribosomes mediated by trans-translation. Binds to tmRNA (also known as SsrA and 10Sa), required for stable association of tmRNA with ribosomes, probably by bridging tmRNA to 50S subunit. tmRNA and SmpB together mimic tRNA shape, replacing the anticodon stem-loop with SmpB (PubMed:22422985, PubMed:17488812).

tmRNA is encoded by the ssrA gene; the 2 termini fold to resemble tRNA(Ala) and it encodes a 'tag peptide', a short internal open reading frame. During trans-translation Ala-aminoacylated tmRNA acts like a tRNA, entering the A-site of stalled ribosomes, displacing the stalled mRNA. The ribosome then switches to translate the ORF on the tmRNA; the nascent peptide is terminated with the 'tag peptide' encoded by the tmRNA and targeted for degradation. The ribosome is freed to recommence translation, which seems to be the essential function of trans-translation.

UniRule annotation6 Publications

Miscellaneous

Athough the Valle et al., electron microscopy paper indicates this protein came from T.thermophilus, its sequence maps to A.aeolicus (PubMed:12677067). The Fu et al., paper maps the coordinates of T.thermophilus to E.coli (PubMed:20940705).2 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

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 functionRNA-binding, rRNA-binding

<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:
SsrA-binding proteinUniRule annotation
Alternative name(s):
Small protein BUniRule annotation
<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:smpBUniRule annotation
Ordered Locus Names:TTHA0902
<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>OrganismiThermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
<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 identifieri300852 [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 lineageiBacteriaDeinococcus-ThermusDeinococciThermalesThermaceaeThermus
<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
  • UP000000532 <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 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_00001030561 – 144SsrA-binding proteinAdd BLAST144

<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

Binds tmRNA (PubMed:12677067, PubMed:20953161, PubMed:22422985, PubMed:17488812, PubMed:20940705, PubMed:22622583). Binds to both the 50S and 30S ribosomal subunits via rRNA contacts, bridges tmRNA binding to stalled ribosomes.

6 Publications

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
300852.55772284

<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

1144
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
Q8RR57

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

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EvolutionaryTracei
Q8RR57

<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

Belongs to the SmpB family.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

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eggNOGi
COG0691, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_108953_0_0_0

Identification of Orthologs from Complete Genome Data

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OMAi
WTNHSAR

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q8RR57

Family and domain databases

Conserved Domains Database

More...
CDDi
cd09294, SmpB, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

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Gene3Di
2.40.280.10, 1 hit

HAMAP database of protein families

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HAMAPi
MF_00023, SmpB, 1 hit

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR023620, SmpB
IPR000037, SsrA-bd_prot
IPR020081, SsrA-bd_prot_CS

The PANTHER Classification System

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PANTHERi
PTHR30308, PTHR30308, 1 hit

Pfam protein domain database

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Pfami
View protein in Pfam
PF01668, SmpB, 1 hit

Superfamily database of structural and functional annotation

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SUPFAMi
SSF74982, SSF74982, 1 hit

TIGRFAMs; a protein family database

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TIGRFAMsi
TIGR00086, smpB, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS01317, SSRP, 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.

Q8RR57-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAPVLENRRA RHDYEILETY EAGIALKGTE VKSLRAGKVD FTGSFARFED
60 70 80 90 100
GELYLENLYI APYEKGSYAN VDPRRKRKLL LHKHELRRLL GKVEQKGLTL
110 120 130 140
VPLKIYFNER GYAKVLLGLA RGKKAYEKRR EDKKEAVRRA LEEL
Length:144
Mass (Da):16,750
Last modified:June 1, 2002 - 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:i4691B4D48F1A2299
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
AB070601 Genomic DNA Translation: BAB86918.1
AP008226 Genomic DNA Translation: BAD70725.1

NCBI Reference Sequences

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RefSeqi
WP_011172991.1, NC_006461.1
YP_144168.1, NC_006461.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

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EnsemblBacteriai
BAD70725; BAD70725; BAD70725

Database of genes from NCBI RefSeq genomes

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GeneIDi
3169917

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ttj:TTHA0902

Pathosystems Resource Integration Center (PATRIC)

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PATRICi
fig|300852.9.peg.894

<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
AB070601 Genomic DNA Translation: BAB86918.1
AP008226 Genomic DNA Translation: BAD70725.1
RefSeqiWP_011172991.1, NC_006461.1
YP_144168.1, NC_006461.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

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PDBei

Protein Data Bank RCSB

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RCSB PDBi

Protein Data Bank Japan

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PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1J1HNMR-A1-144[»]
1WJXX-ray1.70A2-123[»]
2CZJX-ray3.01A/C/E/G1-123[»]
3IYQelectron microscopy-B2-144[»]
3IYRelectron microscopy-B2-144[»]
3IZ4electron microscopy-B2-123[»]
4V6Telectron microscopy8.30W1-123[»]
4V8QX-ray3.10B21-144[»]
6Q95electron microscopy3.7051-144[»]
SMRiQ8RR57
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

STRINGi300852.55772284

Genome annotation databases

EnsemblBacteriaiBAD70725; BAD70725; BAD70725
GeneIDi3169917
KEGGittj:TTHA0902
PATRICifig|300852.9.peg.894

Phylogenomic databases

eggNOGiCOG0691, Bacteria
HOGENOMiCLU_108953_0_0_0
OMAiWTNHSAR
PhylomeDBiQ8RR57

Miscellaneous databases

EvolutionaryTraceiQ8RR57

Family and domain databases

CDDicd09294, SmpB, 1 hit
Gene3Di2.40.280.10, 1 hit
HAMAPiMF_00023, SmpB, 1 hit
InterProiView protein in InterPro
IPR023620, SmpB
IPR000037, SsrA-bd_prot
IPR020081, SsrA-bd_prot_CS
PANTHERiPTHR30308, PTHR30308, 1 hit
PfamiView protein in Pfam
PF01668, SmpB, 1 hit
SUPFAMiSSF74982, SSF74982, 1 hit
TIGRFAMsiTIGR00086, smpB, 1 hit
PROSITEiView protein in PROSITE
PS01317, SSRP, 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 nameiSSRP_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: Q8RR57
Secondary accession number(s): Q5SMG1
<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: April 23, 2003
Last sequence update: June 1, 2002
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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