ID   SECB_PELUB              Reviewed;         140 AA.
AC   Q4FNS8;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   30-AUG-2005, sequence version 1.
DT   25-MAY-2022, entry version 78.
DE   RecName: Full=Putative protein-export protein SecB;
GN   Name=secB; OrderedLocusNames=SAR11_0338;
OS   Pelagibacter ubique (strain HTCC1062).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Pelagibacterales;
OC   Pelagibacteraceae; Candidatus Pelagibacter.
OX   NCBI_TaxID=335992;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HTCC1062;
RX   PubMed=16109880; DOI=10.1126/science.1114057;
RA   Giovannoni S.J., Tripp H.J., Givan S., Podar M., Vergin K.L., Baptista D.,
RA   Bibbs L., Eads J., Richardson T.H., Noordewier M., Rappe M.S., Short J.M.,
RA   Carrington J.C., Mathur E.J.;
RT   "Genome streamlining in a cosmopolitan oceanic bacterium.";
RL   Science 309:1242-1245(2005).
CC   -!- FUNCTION: One of the proteins required for the normal export of
CC       preproteins out of the cell cytoplasm. It is a molecular chaperone that
CC       binds to a subset of precursor proteins, maintaining them in a
CC       translocation-competent state. It also specifically binds to its
CC       receptor SecA (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Homotetramer, a dimer of dimers. One homotetramer interacts
CC       with 1 SecA dimer (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the SecB family. {ECO:0000305}.
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DR   EMBL; CP000084; AAZ21161.1; -; Genomic_DNA.
DR   RefSeq; WP_006997569.1; NC_007205.1.
DR   AlphaFoldDB; Q4FNS8; -.
DR   SMR; Q4FNS8; -.
DR   STRING; 335992.SAR11_0338; -.
DR   EnsemblBacteria; AAZ21161; AAZ21161; SAR11_0338.
DR   GeneID; 66294837; -.
DR   KEGG; pub:SAR11_0338; -.
DR   eggNOG; COG1952; Bacteria.
DR   HOGENOM; CLU_1831483_0_0_5; -.
DR   OMA; CKFILEA; -.
DR   Proteomes; UP000002528; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0051082; F:unfolded protein binding; IEA:InterPro.
DR   GO; GO:0051262; P:protein tetramerization; IEA:InterPro.
DR   GO; GO:0015031; P:protein transport; IEA:UniProtKB-KW.
DR   Gene3D; 3.10.420.10; -; 1.
DR   InterPro; IPR003708; SecB.
DR   InterPro; IPR035958; SecB-like_sf.
DR   Pfam; PF02556; SecB; 1.
DR   SUPFAM; SSF54611; SSF54611; 1.
PE   3: Inferred from homology;
KW   Chaperone; Cytoplasm; Protein transport; Reference proteome; Translocation;
KW   Transport.
FT   CHAIN           1..140
FT                   /note="Putative protein-export protein SecB"
FT                   /id="PRO_0000055391"
SQ   SEQUENCE   140 AA;  16347 MW;  B09E7110A1DECB35 CRC64;
     MTENYKIIGN FIKDMSSETP DTPTYIFVRD KISKYKLNID INSKAVKNGI IEVNTILRFS
     DQPEILKKAH FEITYTSIVK VDEKVSDKKE MEKIILCDVP NKIYPDLERI FLNLLTDSGY
     PGIKFEKKID FTELYKQRAN