ID   IBB2_AMBCE              Reviewed;          63 AA.
AC   P83283;
DT   25-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   25-MAY-2022, entry version 52.
DE   RecName: Full=Bowman-birk type proteinase inhibitor 2;
DE   AltName: Full=TcTI2;
OS   Amburana cearensis (Cerejeira) (Torresea cearensis).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; ADA clade; Amburaneae;
OC   Amburana.
OX   NCBI_TaxID=149628 {ECO:0000305};
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, FUNCTION, AND SUBUNIT.
RC   TISSUE=Seed;
RX   PubMed=9165081; DOI=10.1515/bchm.1997.378.3-4.273;
RA   Tanaka A.S., Sampaio M.U., Marangoni S., de Oliveira B., Novello J.C.,
RA   Oliva M.L.V., Fink E., Sampaio C.A.M.;
RT   "Purification and primary structure determination of a Bowman-Birk trypsin
RT   inhibitor from Torresea cearensis seeds.";
RL   Biol. Chem. 378:273-281(1997).
CC   -!- FUNCTION: Inhibits trypsin, chymotrypsin, plasmin and factor XIIa. Does
CC       not inhibit factor Xa, thrombin, human plasma kallikrein, porcine
CC       pancreatic kallikrein and human urinary kallikrein.
CC       {ECO:0000269|PubMed:9165081}.
CC   -!- SUBUNIT: Exists as a dimer in its native form.
CC       {ECO:0000269|PubMed:9165081}.
CC   -!- SIMILARITY: Belongs to the Bowman-Birk serine protease inhibitor
CC       family. {ECO:0000305}.
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DR   AlphaFoldDB; P83283; -.
DR   SMR; P83283; -.
DR   MEROPS; I12.001; -.
DR   GO; GO:0005576; C:extracellular region; IEA:InterPro.
DR   GO; GO:0004867; F:serine-type endopeptidase inhibitor activity; IDA:UniProtKB.
DR   CDD; cd00023; BBI; 1.
DR   Gene3D; 2.10.69.10; -; 1.
DR   InterPro; IPR035995; Bowman-Birk_prot_inh.
DR   InterPro; IPR000877; Prot_inh_BBI.
DR   Pfam; PF00228; Bowman-Birk_leg; 2.
DR   SMART; SM00269; BowB; 1.
DR   SUPFAM; SSF57247; SSF57247; 1.
DR   PROSITE; PS00281; BOWMAN_BIRK; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Protease inhibitor;
KW   Serine protease inhibitor.
FT   CHAIN           1..63
FT                   /note="Bowman-birk type proteinase inhibitor 2"
FT                   /id="PRO_0000105834"
FT   SITE            14..15
FT                   /note="Reactive bond for trypsin"
FT   SITE            41..42
FT                   /note="Reactive bond for chymotrypsin"
FT   DISULFID        7..61
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        8..23
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        11..57
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        13..21
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        31..38
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        35..50
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
FT   DISULFID        40..48
FT                   /evidence="ECO:0000250|UniProtKB:P80321"
SQ   SEQUENCE   63 AA;  6897 MW;  432840A2F5F418F7 CRC64;
     SSKWEACCDR CACTKSIPPQ CHCADIRLNS CHSACESCAC THSIPAQCRC FDITDFCYKP
     CSG