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Entry version 97 (26 Feb 2020)
Sequence version 1 (09 Jan 2007)
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Protein

Proteasome subunit alpha

Gene

prcA

Organism
Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155) (Mycobacterium smegmatis)
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

Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation. The M.smegmatis proteasome is able to cleave oligopeptides after hydrophobic residues, thus displaying chymotrypsin-like activity. In complex with the ATPase Mpa, degrades protein targets conjugated to a prokaryotic ubiquitin-like protein (Pup). Identified substrates of the M.smegmatis proteasome are the pupylated SodA and Ino1 proteins (PubMed:19028679). The Pup-proteasome system (PPS) is essential for survival under starvation; PPS likely functions to recycle amino acids under nitrogen starvation, thereby enabling the cell to maintain basal metabolic activities (PubMed:24986881).UniRule annotation3 Publications

<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 <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

The formation of the proteasomal ATPase ARC-20S proteasome complex, likely via the docking of the C-termini of ARC into the intersubunit pockets in the alpha-rings, may trigger opening of the gate for substrate entry. Interconversion between the open-gate and close-gate conformations leads to a dynamic regulation of the 20S proteasome proteolysis activity (By similarity). PPS auto-regulates its own activity via pupylation and degradation of its components (PubMed:24986881). Peptidolytic activity is inhibited by N-acetyl-Leu-Leu-norleucinal (Ac-LLnL) in vitro (PubMed:9282749).UniRule annotation2 Publications

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: proteasomal Pup-dependent pathway

This protein is involved in the pathway proteasomal Pup-dependent pathway, which is part of Protein degradation.UniRule annotation
View all proteins of this organism that are known to be involved in the pathway proteasomal Pup-dependent pathway and in Protein degradation.

<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 functionHydrolase, Protease, Threonine protease

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
GCF_000015005:MSMEG_3894-MONOMER
MSME246196:G1H7P-3884-MONOMER

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

More...
UniPathwayi
UPA00997

Protein family/group databases

MEROPS protease database

More...
MEROPSi
T01.980

<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:
Proteasome subunit alphaUniRule annotation (EC:3.4.25.1UniRule annotation)
Alternative name(s):
20S proteasome alpha subunitUniRule annotation
Proteasome core protein PrcAUniRule annotation
<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:prcAUniRule annotation
Ordered Locus Names:MSMEG_3894, MSMEI_3804
<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>OrganismiMycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155) (Mycobacterium smegmatis)
<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 identifieri246196 [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 lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycolicibacterium
<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
  • UP000006158 <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
  • UP000000757 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

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm, Proteasome

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Cells lacking this gene are viable and grow at the wild-type rate, but show a large reduction in the rate of degradation of the pupylated substrates (PubMed:19028679, PubMed:9282749). Cells lacking the Pup-proteasome system (pup/prcS, prcA and prcB) completely lack pupylated proteins and intact proteasomes; they grow as well as wild-type during the exponential phase, but they show reduced survival after prolonged incubation at stationary phase (17 days after inoculation) and become hypersensitive to nitrogen limitation, and, to a lesser extent, to carbon limitation (PubMed:24986881).3 Publications

<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_00003834831 – 246Proteasome subunit alphaAdd BLAST246

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Pupylated at an undetermined lysine residue by the prokaryotic ubiquitin-like protein Pup with the help of the ligase PafA, which leads to its degradation by the proteasome and thereby constitutes a negative auto-regulation.1 Publication

Keywords - PTMi

Ubl conjugation

Proteomic databases

PRoteomics IDEntifications database

More...
PRIDEi
A0QZ46

<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

Up-regulated under nitrogen starvation (at protein level).1 Publication

<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

The 20S proteasome core is composed of 14 alpha and 14 beta subunits that assemble into four stacked heptameric rings, resulting in a barrel-shaped structure. The two inner rings, each composed of seven catalytic beta subunits, are sandwiched by two outer rings, each composed of seven alpha subunits. The catalytic chamber with the active sites is on the inside of the barrel. Has a gated structure, the ends of the cylinder being occluded by the N-termini of the alpha-subunits. Is capped by the proteasome-associated ATPase, ARC. Can also interact with the bacterial proteasome activator Bpa through the C-terminal hydrophobic-tyrosine-X motif (HbYX motif) of Bpa; Bpa forms a homooligomeric ring-like structure which stacks co-axially with the proteasomal alpha-rings (PubMed:25469515).

UniRule annotation1 Publication

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
246196.MSMEI_3804

<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
A0QZ46

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

<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 peptidase T1A family.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105F7N Bacteria
COG0638 LUCA

KEGG Orthology (KO)

More...
KOi
K03432

Identification of Orthologs from Complete Genome Data

More...
OMAi
KYNEFEN

Database of Orthologous Groups

More...
OrthoDBi
1243753at2

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.60.20.10, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_00289_B Proteasome_A_B, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR029055 Ntn_hydrolases_N
IPR023332 Proteasome_alpha-type
IPR022296 Proteasome_asu_bac
IPR001353 Proteasome_sua/b

The PANTHER Classification System

More...
PANTHERi
PTHR11599:SF69 PTHR11599:SF69, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00227 Proteasome, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF56235 SSF56235, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR03691 20S_bact_alpha, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51475 PROTEASOME_ALPHA_2, 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.

A0QZ46-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSFPYFISPE QAMRERSELA RKGIARGRSV VALAYSEGVL FVAENPSRSL
60 70 80 90 100
QKVSELYDRV GFAAVGRFNE FDNLRRGGIQ FADTRGYAYD RRDVTGRQLA
110 120 130 140 150
NVYAQTLGTI FTEQAKPYEV ELCVAEVAHY GETKAPELYR ITYDGSIADE
160 170 180 190 200
PHFVVMGGTT EPIIAALNES YTENASLQDA VEIAVKALSA SAEGAEPRSL
210 220 230 240
GPSTLEVAIL DAGRPRRAFR RITGAALEAL LPEQPQQADS GDKPTE
Length:246
Mass (Da):26,915
Last modified:January 9, 2007 - 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:i7869013FEFD30231
GO

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
AF009645 Genomic DNA Translation: AAC45615.1
CP000480 Genomic DNA Translation: ABK70795.1
CP001663 Genomic DNA Translation: AFP40262.1

NCBI Reference Sequences

More...
RefSeqi
WP_003895345.1, NZ_SIJM01000005.1
YP_888184.1, NC_008596.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
ABK70795; ABK70795; MSMEG_3894
AFP40262; AFP40262; MSMEI_3804

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
4535010

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
msb:LJ00_19345
msg:MSMEI_3804
msm:MSMEG_3894

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|246196.19.peg.3834

<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
AF009645 Genomic DNA Translation: AAC45615.1
CP000480 Genomic DNA Translation: ABK70795.1
CP001663 Genomic DNA Translation: AFP40262.1
RefSeqiWP_003895345.1, NZ_SIJM01000005.1
YP_888184.1, NC_008596.1

3D structure databases

SMRiA0QZ46
ModBaseiSearch...

Protein-protein interaction databases

STRINGi246196.MSMEI_3804

Protein family/group databases

MEROPSiT01.980

Proteomic databases

PRIDEiA0QZ46

Genome annotation databases

EnsemblBacteriaiABK70795; ABK70795; MSMEG_3894
AFP40262; AFP40262; MSMEI_3804
GeneIDi4535010
KEGGimsb:LJ00_19345
msg:MSMEI_3804
msm:MSMEG_3894
PATRICifig|246196.19.peg.3834

Phylogenomic databases

eggNOGiENOG4105F7N Bacteria
COG0638 LUCA
KOiK03432
OMAiKYNEFEN
OrthoDBi1243753at2

Enzyme and pathway databases

UniPathwayiUPA00997
BioCyciGCF_000015005:MSMEG_3894-MONOMER
MSME246196:G1H7P-3884-MONOMER

Family and domain databases

Gene3Di3.60.20.10, 1 hit
HAMAPiMF_00289_B Proteasome_A_B, 1 hit
InterProiView protein in InterPro
IPR029055 Ntn_hydrolases_N
IPR023332 Proteasome_alpha-type
IPR022296 Proteasome_asu_bac
IPR001353 Proteasome_sua/b
PANTHERiPTHR11599:SF69 PTHR11599:SF69, 1 hit
PfamiView protein in Pfam
PF00227 Proteasome, 1 hit
SUPFAMiSSF56235 SSF56235, 1 hit
TIGRFAMsiTIGR03691 20S_bact_alpha, 1 hit
PROSITEiView protein in PROSITE
PS51475 PROTEASOME_ALPHA_2, 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 nameiPSA_MYCS2
<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: A0QZ46
Secondary accession number(s): I7G3V1, O30519
<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: September 22, 2009
Last sequence update: January 9, 2007
Last modified: February 26, 2020
This is version 97 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

Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
  3. Peptidase families
    Classification of peptidase families and list of entries
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