ID   UBACT_RHOIS             Reviewed;          79 AA.
AC   A0A0J1BDH3;
DT   25-OCT-2017, integrated into UniProtKB/Swiss-Prot.
DT   14-OCT-2015, sequence version 1.
DT   25-MAY-2022, entry version 23.
DE   RecName: Full=Prokaryotic ubiquitin-like protein UBact {ECO:0000303|PubMed:28087277};
GN   Name=ubact {ECO:0000303|PubMed:28087277};
GN   ORFNames=RISK_003279 {ECO:0000312|EMBL:KLU04657.1};
OS   Rhodopirellula islandica.
OC   Bacteria; Planctomycetes; Planctomycetia; Pirellulales; Pirellulaceae;
OC   Rhodopirellula.
OX   NCBI_TaxID=595434;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 24040 / K833;
RA   Kizina J., Richter M., Glockner F.O., Harder J.;
RT   "Permanent draft genome of Rhodopirellula islandicus K833.";
RL   Submitted (MAY-2015) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   PREDICTED FUNCTION.
RC   STRAIN=DSM 24040 / K833;
RX   PubMed=28087277; DOI=10.1016/j.bbrc.2017.01.037;
RA   Lehmann G., Udasin R.G., Livneh I., Ciechanover A.;
RT   "Identification of UBact, a ubiquitin-like protein, along with other
RT   homologous components of a conjugation system and the proteasome in
RT   different gram-negative bacteria.";
RL   Biochem. Biophys. Res. Commun. 483:946-950(2017).
CC   -!- FUNCTION: May function as a protein modifier covalently attached to
CC       lysine residues of substrate proteins. As this bacterium does not seem
CC       to encode proteasome subunits and proteasome ATPase adjacently to
CC       UBact, this tagging system may serve another role than targeting the
CC       modified proteins for degradation by proteasomes. {ECO:0000305,
CC       ECO:0000305|PubMed:28087277}.
CC   -!- SIMILARITY: Belongs to the ubiquitin-like protein UBact family.
CC       {ECO:0000255|HAMAP-Rule:MF_02133}.
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DR   EMBL; LECT01000026; KLU04657.1; -; Genomic_DNA.
DR   RefSeq; WP_047814805.1; NZ_LECT01000026.1.
DR   AlphaFoldDB; A0A0J1BDH3; -.
DR   SMR; A0A0J1BDH3; -.
DR   EnsemblBacteria; KLU04657; KLU04657; RISK_003279.
DR   PATRIC; fig|595434.4.peg.3129; -.
DR   Proteomes; UP000036367; Unassembled WGS sequence.
DR   GO; GO:0031386; F:protein tag; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_02133; UBact; 1.
DR   InterPro; IPR037543; UBact.
PE   3: Inferred from homology;
KW   Isopeptide bond; Ubl conjugation pathway.
FT   CHAIN           1..79
FT                   /note="Prokaryotic ubiquitin-like protein UBact"
FT                   /id="PRO_0000441768"
FT   REGION          1..50
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        1..21
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   CROSSLNK        79
FT                   /note="Isoglutamyl lysine isopeptide (Glu-Lys) (interchain
FT                   with K-? in acceptor proteins)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   79 AA;  8789 MW;  79366E9B4D6553FD CRC64;
     MNATQTQPQN ADQQSVAATA KEQGTEARDR QPPLHPETPA PSNTPRKDSL NQFASWLRQD
     ARAEATTYLH RANTHHDGE