ID   CSMB_CHLTI              Reviewed;          74 AA.
AC   P15523;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   03-AUG-2022, entry version 53.
DE   RecName: Full=Chlorosome envelope protein B;
DE   AltName: Full=Chlorosome 7.5 kDa protein;
DE   AltName: Full=Gerola-Olson chlorosome protein;
DE   Contains:
DE     RecName: Full=Chlorosome envelope protein B, short form;
GN   Name=csmB;
OS   Chlorobaculum thiosulfatiphilum (Chlorobium limicola f.sp.
OS   thiosulfatophilum).
OC   Bacteria; Chlorobi; Chlorobia; Chlorobiales; Chlorobiaceae; Chlorobaculum.
OX   NCBI_TaxID=115852;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=2015294; DOI=10.1016/0167-4838(91)90061-4;
RA   Hoejrup P., Gerola P., Hansen H.F., Mikkelsen J.M., Shaded A.E.,
RA   Knudsen J., Roepstorff P., Olson J.M.;
RT   "The amino acid sequence of a major protein component in the light
RT   harvesting complex of the green photosynthetic bacterium Chlorobium
RT   limicola f. thiosulfatophilum.";
RL   Biochim. Biophys. Acta 1077:220-224(1991).
RN   [2]
RP   PROTEIN SEQUENCE.
RC   STRAIN=DSM 249 / 6230 / Tassajara;
RA   Wagner-Huber R., Brunisholz R., Frank G., Zuber H.;
RT   "The BChlc/e-binding polypeptides from chlorosomes of green photosynthetic
RT   bacteria.";
RL   FEBS Lett. 239:8-12(1988).
CC   -!- FUNCTION: Component of the photosynthetic apparatus which may bind the
CC       chlorosome to the bacteriochlorophyll a protein monolayer.
CC   -!- SUBCELLULAR LOCATION: Chlorosome, chlorosome envelope.
CC   -!- PTM: A short form lacking first Ser is produced.
CC   -!- SIMILARITY: Belongs to the CsmB/CsmF family. {ECO:0000305}.
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DR   PIR; S05564; S05564.
DR   PIR; S14729; S14729.
DR   AlphaFoldDB; P15523; -.
DR   SMR; P15523; -.
DR   GO; GO:0033105; C:chlorosome envelope; IEA:UniProtKB-SubCell.
DR   GO; GO:0042314; F:bacteriochlorophyll binding; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Bacteriochlorophyll; Chlorophyll; Chlorosome; Chromophore;
KW   Direct protein sequencing; Photosynthesis; Repeat.
FT   CHAIN           1..74
FT                   /note="Chlorosome envelope protein B"
FT                   /id="PRO_0000192637"
FT   CHAIN           2..74
FT                   /note="Chlorosome envelope protein B, short form"
FT                   /id="PRO_0000293488"
FT   REPEAT          7..16
FT                   /note="1"
FT   REPEAT          28..38
FT                   /note="2"
FT   REPEAT          39..49
FT                   /note="3"
FT   REPEAT          50..60
FT                   /note="4"
FT   REGION          7..60
FT                   /note="4 X approximate repeats"
FT   MOD_RES         2
FT                   /note="Blocked amino end (Asn); in short form"
SQ   SEQUENCE   74 AA;  7489 MW;  47DFFC35FE8D4C00 CRC64;
     SNGTNIDVAG AINTLTETFG KLFQMQLDVA NTALKALADV AEPLGKTATD LVGNFAGAAT
     QILQSVSAAI APKK