ID   LAMB_HAHCH              Reviewed;         398 AA.
AC   Q2SQ17;
DT   12-JUN-2007, integrated into UniProtKB/Swiss-Prot.
DT   24-JAN-2006, sequence version 1.
DT   25-MAY-2022, entry version 87.
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=HCH_00345;
OS   Hahella chejuensis (strain KCTC 2396).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Oceanospirillales;
OC   Hahellaceae; Hahella.
OX   NCBI_TaxID=349521;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KCTC 2396;
RX   PubMed=16352867; DOI=10.1093/nar/gki1016;
RA   Jeong H., Yim J.H., Lee C., Choi S.-H., Park Y.K., Yoon S.H., Hur C.-G.,
RA   Kang H.-Y., Kim D., Lee H.H., Park K.H., Park S.-H., Park H.-S., Lee H.K.,
RA   Oh T.K., Kim J.F.;
RT   "Genomic blueprint of Hahella chejuensis, a marine microbe producing an
RT   algicidal agent.";
RL   Nucleic Acids Res. 33:7066-7073(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; CP000155; ABC27257.1; -; Genomic_DNA.
DR   RefSeq; WP_011394334.1; NC_007645.1.
DR   AlphaFoldDB; Q2SQ17; -.
DR   SMR; Q2SQ17; -.
DR   STRING; 349521.HCH_00345; -.
DR   EnsemblBacteria; ABC27257; ABC27257; HCH_00345.
DR   KEGG; hch:HCH_00345; -.
DR   eggNOG; COG4580; Bacteria.
DR   HOGENOM; CLU_032473_4_1_6; -.
DR   OMA; DYGRANA; -.
DR   OrthoDB; 1013077at2; -.
DR   Proteomes; UP000000238; 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; Reference proteome;
KW   Signal; Sugar transport; Transmembrane; Transmembrane beta strand;
KW   Transport.
FT   SIGNAL          1..30
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   CHAIN           31..398
FT                   /note="Maltoporin"
FT                   /id="PRO_0000290220"
FT   SITE            36
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            67
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            238
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            360
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
FT   SITE            397
FT                   /note="Greasy slide, important in sugar transport"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01301"
SQ   SEQUENCE   398 AA;  43849 MW;  12994046D9BC701C CRC64;
     MTDKNNKRLF KVAPLATAIA ASLFTVNASA VEWHGYARSG IGMSDNGDQQ CINKQAVGRL
     GNECETYAEL DLQQELFNRD GKTFKVETML SYKSNQDGDY EALNSEDDEI ALRQMNVQAK
     GVLGFAPEAT LWAGKRYYQR HDIHHLDLFY WDVSGPGAGI EGIDAGAGKF SAAWTRGYGN
     INILDFRYSG IQVGASSLEV GLDLAKPRLT DAQKDAGAAD DLSTLFTAEL STPIMDGFNK
     IVFQYGTEGY ASPMRNFGGG QWNGTLDKGG KGFRLIDWGV VKPSANIELS YAAMYGVFED
     DDMNDDSSFY SISARPAYKW SDYMRTYLEV GYFAADDDGV DSQLDKITIA QAWSAGPSFW
     ARPEIRVFAS YINDGEGTPF EGGEDSVLNF GVQMEAWW