ID   LAMB_SALCH              Reviewed;         452 AA.
AC   Q57GZ6;
DT   21-MAR-2006, integrated into UniProtKB/Swiss-Prot.
DT   10-MAY-2005, sequence version 1.
DT   25-MAY-2022, entry version 81.
DE   RecName: Full=Maltoporin {ECO:0000255|HAMAP-Rule:MF_01301};
DE   AltName: Full=Maltose-inducible porin {ECO:0000255|HAMAP-Rule:MF_01301};
DE   Flags: Precursor;
GN   Name=lamB {ECO:0000255|HAMAP-Rule:MF_01301}; OrderedLocusNames=SCH_4110;
OS   Salmonella choleraesuis (strain SC-B67).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Salmonella.
OX   NCBI_TaxID=321314;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SC-B67;
RX   PubMed=15781495; DOI=10.1093/nar/gki297;
RA   Chiu C.-H., Tang P., Chu C., Hu S., Bao Q., Yu J., Chou Y.-Y., Wang H.-S.,
RA   Lee Y.-S.;
RT   "The genome sequence of Salmonella enterica serovar Choleraesuis, a highly
RT   invasive and resistant zoonotic pathogen.";
RL   Nucleic Acids Res. 33:1690-1698(2005).
CC   -!- FUNCTION: Involved in the transport of maltose and maltodextrins.
CC       {ECO:0000255|HAMAP-Rule:MF_01301}.
CC   -!- SUBUNIT: Homotrimer formed of three 18-stranded antiparallel beta-
CC       barrels, containing three independent channels. {ECO:0000255|HAMAP-
CC       Rule:MF_01301}.
CC   -!- SUBCELLULAR LOCATION: Cell outer membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01301}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01301}.
CC   -!- INDUCTION: By maltose. {ECO:0000255|HAMAP-Rule:MF_01301}.
CC   -!- SIMILARITY: Belongs to the porin LamB (TC 1.B.3) family.
CC       {ECO:0000255|HAMAP-Rule:MF_01301}.
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DR   EMBL; AE017220; AAX68016.1; -; Genomic_DNA.
DR   RefSeq; WP_000973642.1; NC_006905.1.
DR   AlphaFoldDB; Q57GZ6; -.
DR   SMR; Q57GZ6; -.
DR   EnsemblBacteria; AAX68016; AAX68016; SCH_4110.
DR   KEGG; sec:SCH_4110; -.
DR   HOGENOM; CLU_032473_4_1_6; -.
DR   OMA; DYGRANA; -.
DR   Proteomes; UP000000538; Chromosome.
DR   GO; GO:0009279; C:cell outer membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0046930; C:pore complex; IEA:UniProtKB-KW.
DR   GO; GO:0042958; F:maltodextrin transmembrane transporter activity; IEA:InterPro.
DR   GO; GO:0015481; F:maltose transporting porin activity; IEA:InterPro.
DR   GO; GO:0006811; P:ion transport; IEA:UniProtKB-KW.
DR   CDD; cd01346; Maltoporin-like; 1.
DR   Gene3D; 2.40.170.10; -; 1.
DR   HAMAP; MF_01301; LamB; 1.
DR   InterPro; IPR023738; Maltoporin.
DR   InterPro; IPR003192; Porin_LamB.
DR   InterPro; IPR036998; Porin_LamB_sf.
DR   Pfam; PF02264; LamB; 1.
PE   3: Inferred from homology;
KW   Cell outer membrane; Ion transport; Membrane; Porin; Signal;
KW   Sugar transport; Transmembrane; Transmembrane beta strand; Transport.
FT   SIGNAL          1..25
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   CHAIN           26..452
FT                   /note="Maltoporin"
FT                   /id="PRO_0000228855"
FT   SITE            31
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            66
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            99
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            143
FT                   /note="Important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            252
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            393
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            451
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
SQ   SEQUENCE   452 AA;  50560 MW;  34C6DF654FF5F395 CRC64;
     MMITLRKLPL AVAVAAGVMS AQAMAVDFHG YARSGIGWTG SGGEQQCFQA TGAQSKYRLG
     NECETYAELK LGQEVWKEGD KSFYFDTNVA YSVNQQNDWE STDPAFREAN VQGKNLIEWL
     PGSTIWAGKR FYQRHDVHMI DFYYWDISGP GAGIENIDLG FGKLSLAATR STEAGGSYTF
     SSQNIYDEVK DTANDVFDVR LAGLQTNPDG VLELGVDYGR ANTTDGYKLA DGASKDGWMF
     TAEHTQSMLK GYNKFVVQYA TDAMTTQGKG QARGSDGSSS FTEELPDGTK INYANKVINN
     NGDMWRILDH GAISLGDKWD LMYVGMYQNI DWDNNLGTEW WTVGVRPMYK WTPIMSTLLE
     VGYDNVKSQQ TGDRNNQYKI TLAQQWQAGD SIWSRPAIRI FATYAKWDEK WGYIKDGDNI
     SRYAAATNSG ISTNSRGDSD EWTFGAQMEI WW