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B1MAI2 (PSB_MYCA9) Reviewed, UniProtKB/Swiss-Prot

Last modified July 9, 2014. Version 44. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (3) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Proteasome subunit beta

EC=3.4.25.1
Alternative name(s):
20S proteasome beta subunit
Proteasome core protein PrcB
Gene names
Name:prcB
Ordered Locus Names:MAB_2172
OrganismMycobacterium abscessus (strain ATCC 19977 / DSM 44196) [Complete proteome] [HAMAP]
Taxonomic identifier561007 [NCBI]
Taxonomic lineageBacteriaActinobacteriaActinobacteridaeActinomycetalesCorynebacterineaeMycobacteriaceaeMycobacteriumMycobacterium abscessus

Protein attributes

Sequence length292 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceInferred from homology

General annotation (Comments)

Function

Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation By similarity. HAMAP-Rule MF_02113

Catalytic activity

Cleavage of peptide bonds with very broad specificity. HAMAP-Rule MF_02113

Enzyme regulation

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. HAMAP-Rule MF_02113

Pathway

Protein degradation; proteasomal Pup-dependent pathway. HAMAP-Rule MF_02113

Subunit structure

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 By similarity.

Subcellular location

Cytoplasm By similarity HAMAP-Rule MF_02113.

Sequence similarities

Belongs to the peptidase T1B family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Propeptide1 – 5454Removed in mature form; by autocatalysis By similarity
PRO_0000397520
Chain55 – 292238Proteasome subunit beta HAMAP-Rule MF_02113
PRO_0000397521

Sites

Active site551Nucleophile By similarity

Sequences

Sequence LengthMass (Da)Tools
B1MAI2 [UniParc].

Last modified April 29, 2008. Version 1.
Checksum: CB400F788C12C1AF

FASTA29230,881
        10         20         30         40         50         60 
MIWRDDAIAS QPAGQHFRNS HLSSFSEYLR AQAPELLPAL GKASADVIGN LPHGTTIVAL 

        70         80         90        100        110        120 
TYRGGVLIAG DRRATQGNYI ANRDIDKVQI TDNYSATGIA GTAAIAVEFA RLYAVELEHY 

       130        140        150        160        170        180 
EKLEGVQLTF NGKANRLSAL VRGNLAAAMQ GLVAVPLLVG YDLDDPNGET AGRIVSFDVA 

       190        200        210        220        230        240 
GGWHVESDGY QAVGSGSVFA KSSIKKLYRP GGDALTALAV AVEALYDAAD DDSATGGPDL 

       250        260        270        280        290 
VRRVFPTAIR IDSGGAVRVP EADIERIARE VIAKRTEAAR EEADLRESGG DS 

« Hide

References

[1]"Acquisition of foreign virulence genes by the cystic fibrosis pathogen Mycobacterium abscessus."
Genoscope
Ripoll F., Pasek S., Schenowitz C., Dossat C., Barbe V., Rottman M., Heym B., Herrmann J.L., Daffe M., Brosch R., Risler J.L., Gaillard J.L.
Submitted (MAR-2008) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: ATCC 19977 / DSM 44196.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CU458896 Genomic DNA. Translation: CAM62253.1.
RefSeqYP_001702907.1. NC_010397.1.

3D structure databases

ProteinModelPortalB1MAI2.
SMRB1MAI2. Positions 20-273.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING561007.MAB_2172.

Protein family/group databases

MEROPST01.005.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaCAM62253; CAM62253; MAB_2172.
GeneID5964685.
KEGGmab:MAB_2172.
PATRIC17976066. VBIMycAbs55940_2212.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0638.
HOGENOMHOG000245308.
KOK03433.
OMAFQVELEH.
OrthoDBEOG6XM79W.

Enzyme and pathway databases

BioCycMABS36809-WGS:GSQO-2184-MONOMER.
MABS561007:GJTG-2184-MONOMER.
UniPathwayUPA00997.

Family and domain databases

Gene3D3.60.20.10. 1 hit.
HAMAPMF_02113_B. Proteasome_B_B.
InterProIPR029055. Ntn_hydrolases_N.
IPR022483. Pept_T1A_Psome_suB_actinobac.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamPF00227. Proteasome. 1 hit.
[Graphical view]
SUPFAMSSF56235. SSF56235. 1 hit.
TIGRFAMsTIGR03690. 20S_bact_beta. 1 hit.
PROSITEPS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSB_MYCA9
AccessionPrimary (citable) accession number: B1MAI2
Entry history
Integrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: April 29, 2008
Last modified: July 9, 2014
This is version 44 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

Peptidase families

Classification of peptidase families and list of entries

PATHWAY comments

Index of metabolic and biosynthesis pathways