ID   LAMB_SALNS              Reviewed;         452 AA.
AC   B4T1S6;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   23-SEP-2008, sequence version 1.
DT   25-MAY-2022, entry version 73.
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};
GN   OrderedLocusNames=SNSL254_A4574;
OS   Salmonella newport (strain SL254).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Salmonella.
OX   NCBI_TaxID=423368;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SL254;
RX   PubMed=21602358; DOI=10.1128/jb.00297-11;
RA   Fricke W.F., Mammel M.K., McDermott P.F., Tartera C., White D.G.,
RA   Leclerc J.E., Ravel J., Cebula T.A.;
RT   "Comparative genomics of 28 Salmonella enterica isolates: evidence for
RT   CRISPR-mediated adaptive sublineage evolution.";
RL   J. Bacteriol. 193:3556-3568(2011).
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; CP001113; ACF64106.1; -; Genomic_DNA.
DR   RefSeq; WP_000973678.1; NZ_CCMR01000003.1.
DR   AlphaFoldDB; B4T1S6; -.
DR   SMR; B4T1S6; -.
DR   EnsemblBacteria; ACF64106; ACF64106; SNSL254_A4574.
DR   KEGG; see:SNSL254_A4574; -.
DR   HOGENOM; CLU_032473_4_1_6; -.
DR   OMA; DYGRANA; -.
DR   Proteomes; UP000008824; 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_1000140492"
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;  50588 MW;  C4BFB8CA1218C2C2 CRC64;
     MMITLRKLPL AVAVAAGVMS AQAMAVDFHG YARSGIGWTG SGGEQQCFQV 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