ID   PUP_BIFA0               Reviewed;          71 AA.
AC   B8DTX7;
DT   19-JAN-2010, integrated into UniProtKB/Swiss-Prot.
DT   03-MAR-2009, sequence version 1.
DT   03-AUG-2022, entry version 56.
DE   RecName: Full=Prokaryotic ubiquitin-like protein Pup {ECO:0000255|HAMAP-Rule:MF_02106};
DE   AltName: Full=Bacterial ubiquitin-like modifier {ECO:0000255|HAMAP-Rule:MF_02106};
GN   Name=pup {ECO:0000255|HAMAP-Rule:MF_02106}; OrderedLocusNames=BLA_1168;
OS   Bifidobacterium animalis subsp. lactis (strain AD011).
OC   Bacteria; Actinobacteria; Bifidobacteriales; Bifidobacteriaceae;
OC   Bifidobacterium.
OX   NCBI_TaxID=442563;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AD011;
RX   PubMed=19011029; DOI=10.1128/jb.01515-08;
RA   Kim J.F., Jeong H., Yu D.S., Choi S.-H., Hur C.-G., Park M.-S., Yoon S.H.,
RA   Kim D.-W., Ji G.E., Park H.-S., Oh T.K.;
RT   "Genome sequence of the probiotic bacterium Bifidobacterium animalis subsp.
RT   lactis AD011.";
RL   J. Bacteriol. 191:678-679(2009).
CC   -!- FUNCTION: Protein modifier that is covalently attached to lysine
CC       residues of substrate proteins, thereby targeting them for proteasomal
CC       degradation. The tagging system is termed pupylation.
CC       {ECO:0000255|HAMAP-Rule:MF_02106}.
CC   -!- PATHWAY: Protein degradation; proteasomal Pup-dependent pathway.
CC       {ECO:0000255|HAMAP-Rule:MF_02106}.
CC   -!- SUBUNIT: Strongly interacts with the proteasome-associated ATPase ARC
CC       through a hydrophobic interface; the interacting region of Pup lies in
CC       its C-terminal half. There is one Pup binding site per ARC hexamer
CC       ring. {ECO:0000255|HAMAP-Rule:MF_02106}.
CC   -!- DOMAIN: The N-terminal unstructured half of Pup provides a signal
CC       required to initiate unfolding and degradation by the proteasome but is
CC       not needed for pupylation, while the C-terminal helical half of Pup
CC       interacts with ARC to target proteins to the proteasome.
CC       {ECO:0000255|HAMAP-Rule:MF_02106}.
CC   -!- SIMILARITY: Belongs to the prokaryotic ubiquitin-like protein family.
CC       {ECO:0000255|HAMAP-Rule:MF_02106}.
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DR   EMBL; CP001213; ACL29456.1; -; Genomic_DNA.
DR   RefSeq; WP_004218910.1; NC_011835.1.
DR   AlphaFoldDB; B8DTX7; -.
DR   SMR; B8DTX7; -.
DR   STRING; 442563.BLA_1168; -.
DR   EnsemblBacteria; ACL29456; ACL29456; BLA_1168.
DR   GeneID; 66532993; -.
DR   KEGG; bla:BLA_1168; -.
DR   PATRIC; fig|442563.4.peg.1226; -.
DR   HOGENOM; CLU_183816_0_0_11; -.
DR   OMA; PQEFAHT; -.
DR   UniPathway; UPA00997; -.
DR   Proteomes; UP000002456; Chromosome.
DR   GO; GO:0070628; F:proteasome binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0031386; F:protein tag; IEA:UniProtKB-UniRule.
DR   GO; GO:0019941; P:modification-dependent protein catabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0010498; P:proteasomal protein catabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0070490; P:protein pupylation; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_02106; Pup; 1.
DR   InterPro; IPR008515; Ubiquitin-like_Pup.
DR   Pfam; PF05639; Pup; 1.
DR   TIGRFAMs; TIGR03687; pupylate_cterm; 1.
PE   3: Inferred from homology;
KW   Coiled coil; Isopeptide bond; Reference proteome; Ubl conjugation pathway.
FT   CHAIN           1..71
FT                   /note="Prokaryotic ubiquitin-like protein Pup"
FT                   /id="PRO_0000390570"
FT   REGION          1..30
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          27..65
FT                   /note="ARC ATPase binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02106"
FT   COILED          23..56
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02106"
FT   CROSSLNK        71
FT                   /note="Isoglutamyl lysine isopeptide (Glu-Lys) (interchain
FT                   with K-? in acceptor proteins)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02106"
SQ   SEQUENCE   71 AA;  7656 MW;  29FE8969EB1AD69F CRC64;
     MPSASGHHQI PAETQRHDDD QTQETAQGLS AAAMLAQEQA DDLDAILDDI ETVLETNAEE
     YVSSFVQKGG E