ID   SLAB_ACIAM              Reviewed;         511 AA.
AC   B1GT62;
DT   23-MAY-2018, integrated into UniProtKB/Swiss-Prot.
DT   29-APR-2008, sequence version 1.
DT   25-MAY-2022, entry version 31.
DE   RecName: Full=S-layer protein B {ECO:0000303|PubMed:19522740};
DE   AltName: Full=Surface layer small protein {ECO:0000305};
DE   Flags: Precursor;
GN   Name=slaB {ECO:0000303|PubMed:19522740};
OS   Acidianus ambivalens (Desulfurolobus ambivalens).
OC   Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Acidianus.
OX   NCBI_TaxID=2283;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], FUNCTION, SUBUNIT, SUBCELLULAR LOCATION,
RP   AND INDUCTION.
RC   STRAIN=Lei 10 / DSM 3772 / JCM 9191;
RX   PubMed=19522740; DOI=10.1111/j.1365-2958.2009.06746.x;
RA   Veith A., Klingl A., Zolghadr B., Lauber K., Mentele R., Lottspeich F.,
RA   Rachel R., Albers S.V., Kletzin A.;
RT   "Acidianus, Sulfolobus and Metallosphaera surface layers: structure,
RT   composition and gene expression.";
RL   Mol. Microbiol. 73:58-72(2009).
CC   -!- FUNCTION: S-layer small protein. May anchor the complex to the cell
CC       membrane. {ECO:0000269|PubMed:19522740}.
CC   -!- SUBUNIT: The mushroom-shaped unit cells of the Sulfolobales' S-layers
CC       may consist of three SlaB subunits and six SlaA subunits.
CC       {ECO:0000305|PubMed:19522740}.
CC   -!- SUBCELLULAR LOCATION: Secreted, cell wall, S-layer
CC       {ECO:0000305|PubMed:19522740}. Cell membrane {ECO:0000255}; Single-pass
CC       membrane protein {ECO:0000255}.
CC   -!- INDUCTION: Constitutively expressed. {ECO:0000269|PubMed:19522740}.
CC   -!- SIMILARITY: Belongs to the Sulfolobales SlaB family. {ECO:0000305}.
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DR   EMBL; AM690769; CAM84438.1; -; Genomic_DNA.
DR   AlphaFoldDB; B1GT62; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-KW.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030115; C:S-layer; IEA:UniProtKB-SubCell.
PE   1: Evidence at protein level;
KW   Cell membrane; Cell wall; Coiled coil; Membrane; S-layer; Secreted; Signal;
KW   Transmembrane; Transmembrane helix.
FT   SIGNAL          1..24
FT                   /evidence="ECO:0000255"
FT   CHAIN           25..511
FT                   /note="S-layer protein B"
FT                   /id="PRO_0000444053"
FT   TRANSMEM        487..507
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   COILED          358..392
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   511 AA;  55001 MW;  74F0CB6718993AF7 CRC64;
     MVKYMNLIVL GMLMFGVFVT LSLGSSTALT VYSPFPGEHV ALINPKELIL NISVYDPIAP
     VNSTVGVTIS GPYDIKMTSA GVPVGELNSS HMLTVTDYAF PVTLFEANGT QISAFIPGQY
     NVTISVAGCS ETIPIYVISP NEIEILVCVY SNGVPLPGAT VSIYNVTNGE LLLTNTTNSQ
     GLAELTVPYV YTMTNEYNVT AVKPGYQLVY KEVTVPADHI TPVTVKLTTK PITFVLTPVY
     FQDMGVIEPA EPAQLPGTPE PVYVASAYMG TTFSIIINAT ESGMPVQGAT ISASYLISGK
     QMSSTATYIG NGQYNLSIVL PNSTVPYDLE LVITGTYQTN TYTFITLLSV QPNFYCEIQR
     LQSEVSVLES EVDQLKVEIQ SLNETLTLQA SEIASLKTYL EGNVSYFSMQ ISSLESEIKY
     LNSTLMTLSS ELTTVNSTLT SEVNSLTSEV NSLSTQVSTL STEVNNLNTT INNDNQKISS
     LTTLVYGGII LGVIALIIAI VAVVLVFRKV A