ID   OMPA_ACTLI              Reviewed;          21 AA.
AC   P80444;
DT   26-APR-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2004, sequence version 1.
DT   25-MAY-2022, entry version 54.
DE   RecName: Full=Outer membrane protein A {ECO:0000303|PubMed:8837386};
DE   AltName: Full=Major outer membrane protein;
DE            Short=MOMP;
DE   Flags: Fragment;
GN   Name=ompA {ECO:0000303|PubMed:8837386};
OS   Actinobacillus lignieresii.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Actinobacillus.
OX   NCBI_TaxID=720 {ECO:0000305};
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, AND SUBCELLULAR LOCATION.
RC   STRAIN=R 653 {ECO:0000269|PubMed:8837386};
RX   PubMed=8837386; DOI=10.1016/s0934-8840(96)80101-0;
RA   Hartmann L., Schroeder W., Luebke-Becker A.;
RT   "Serological and biochemical properties of the major outer membrane protein
RT   within strains of the genus Actinobacillus.";
RL   Zentralbl. Bakteriol. 284:255-262(1996).
CC   -!- FUNCTION: With TolR probably plays a role in maintaining the position
CC       of the peptidoglycan cell wall in the periplasm. Acts as a porin with
CC       low permeability that allows slow penetration of small solutes; an
CC       internal gate slows down solute passage.
CC       {ECO:0000250|UniProtKB:P0A910}.
CC   -!- SUBUNIT: Monomer and homodimer. {ECO:0000250|UniProtKB:P0A910}.
CC   -!- SUBCELLULAR LOCATION: Cell outer membrane
CC       {ECO:0000250|UniProtKB:P0A910, ECO:0000269|PubMed:8837386}; Multi-pass
CC       membrane protein {ECO:0000250|UniProtKB:P0A910,
CC       ECO:0000269|PubMed:8837386}.
CC   -!- DOMAIN: The extracellular loops are most variable in sequence, and in
CC       some bacteria confer sensitivity to phage and/or colicins.
CC       {ECO:0000250|UniProtKB:P0A910}.
CC   -!- SIMILARITY: Belongs to the outer membrane OOP (TC 1.B.6) superfamily.
CC       OmpA family. {ECO:0000305}.
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DR   AlphaFoldDB; P80444; -.
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; IPR000498; OmpA-like_TM_dom.
DR   Pfam; PF01389; OmpA_membrane; 1.
PE   1: Evidence at protein level;
KW   Cell outer membrane; Direct protein sequencing; Ion transport; Membrane;
KW   Porin; Transmembrane; Transmembrane beta strand; Transport.
FT   CHAIN           1..>21
FT                   /note="Outer membrane protein A"
FT                   /id="PRO_0000196257"
FT   TRANSMEM        6..16
FT                   /note="Beta stranded"
FT                   /evidence="ECO:0000250|UniProtKB:P0A910"
FT   NON_TER         21
FT                   /evidence="ECO:0000303|PubMed:8837386"
SQ   SEQUENCE   21 AA;  2441 MW;  438E5D689188EDF3 CRC64;
     APKDDTWYTG AKLGWSQYHD T