ID   OMP2A_BRUOV             Reviewed;         346 AA.
AC   Q45331; Q0GK37;
DT   25-NOV-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 59.
DE   RecName: Full=Porin Omp2a;
DE   Flags: Precursor;
GN   Name=omp2a;
OS   Brucella ovis.
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Brucellaceae; Brucella/Ochrobactrum group; Brucella.
OX   NCBI_TaxID=236;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8573514; DOI=10.1099/00207713-46-1-329;
RA   Ficht T.A., Husseinen H.S., Derr J., Bearden S.W.;
RT   "Species-specific sequences at the omp2 locus of Brucella type strains.";
RL   Int. J. Syst. Bacteriol. 46:329-331(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=76-250;
RX   PubMed=11466287; DOI=10.1128/jb.183.16.4839-4847.2001;
RA   Paquet J.-Y., Diaz M.A., Genevrois S., Grayon M., Verger J.-M.,
RA   de Bolle X., Lakey J.H., Letesson J.-J., Cloeckaert A.;
RT   "Molecular, antigenic, and functional analyses of Omp2b porin size variants
RT   of Brucella spp.";
RL   J. Bacteriol. 183:4839-4847(2001).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=019;
RA   Wang Y., Chen C., Liu J.;
RT   "A new Brucella: Xinjiang Brucella ovis 019.";
RL   Submitted (JUL-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Forms passive diffusion pores that allow small molecular
CC       weight hydrophilic materials across the outer membrane.
CC       {ECO:0000250|UniProtKB:B2SAB9}.
CC   -!- SUBUNIT: Monomer. {ECO:0000250|UniProtKB:B2SAB9}.
CC   -!- SUBCELLULAR LOCATION: Cell outer membrane
CC       {ECO:0000250|UniProtKB:B2SAB9}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:B2SAB9}.
CC   -!- DOMAIN: Consists of 16-stranded beta-barrel sheets, with large surface-
CC       exposed loops, that form a transmembrane pore at the center of each
CC       barrel. The pore is partially ocluded by a peptide loop that folds into
CC       the pore lumen. {ECO:0000250|UniProtKB:B2SAB9}.
CC   -!- MISCELLANEOUS: The pore formed by Omp2a is larger than the one formed
CC       by Omp2b. Omp2b pores have optimal permeability to allow growth and
CC       protection against harmful compounds. The larger pore formed by Omp2a
CC       may be advantageous for intracellular growth, when the bacterium is
CC       competing with the host cell for nutrients whose concentration is
CC       particularly low within the phagosome. {ECO:0000250|UniProtKB:B2SAB9}.
CC   -!- SIMILARITY: Belongs to the alphaproteobacteria porin family.
CC       {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; U26442; AAA67795.1; -; Genomic_DNA.
DR   EMBL; AY008720; AAG38244.1; -; Genomic_DNA.
DR   EMBL; DQ861301; ABI23034.1; -; Genomic_DNA.
DR   RefSeq; WP_006011928.1; NZ_UFUD01000001.1.
DR   AlphaFoldDB; Q45331; -.
DR   GeneID; 45124091; -.
DR   GO; GO:0009279; C:cell outer membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0046930; C:pore complex; IEA:UniProtKB-KW.
DR   GO; GO:0015288; F:porin activity; IEA:UniProtKB-KW.
DR   GO; GO:0006811; P:ion transport; IEA:UniProtKB-KW.
DR   InterPro; IPR003684; Porin_alphabac.
DR   Pfam; PF02530; Porin_2; 1.
PE   3: Inferred from homology;
KW   Cell outer membrane; Ion transport; Membrane; Porin; Signal; Transmembrane;
KW   Transmembrane beta strand; Transport.
FT   SIGNAL          1..22
FT                   /evidence="ECO:0000255"
FT   CHAIN           23..346
FT                   /note="Porin Omp2a"
FT                   /id="PRO_0000354018"
SQ   SEQUENCE   346 AA;  37070 MW;  5671206178D6DF40 CRC64;
     MNIKSLLLGS AAALVAASGA QAADAIVAPE PEAVEYVRVC DAYGAGYFYI PGTETCLRIS
     GYVRYDVKGG DDVYTGSDRK GWDKGARFAL MFNTNSETEL GTLGTYTQLR FNYTSNNSRH
     DGQYGDFSDD RDVADGSVST GTDLQFAYIT LGGFKVGIDE SEFHTFTGYL GDIINDDVIS
     AGSYRTGKIA YTFTGGNGFS AVIALEQGGE DVDNDYTIDG YMPHVVGGLK YAGGWGSIAG
     VVAYDSVIEE WATKVRGDVN ITDRFSVWLQ GAYSSAATPN QNYGQWGGDW AVWGGAKFIA
     TEKATFNLQA AHDDWGKTAV TANVAYQLVP GFTITPEVSY TKFGGE