ID   IBB4_LATSA              Reviewed;          30 AA.
AC   B3EWN8;
DT   05-SEP-2012, integrated into UniProtKB/Swiss-Prot.
DT   05-SEP-2012, sequence version 1.
DT   25-MAY-2022, entry version 17.
DE   RecName: Full=Bowman-Birk type proteinase inhibitor 4;
DE   AltName: Full=LSI-4 {ECO:0000303|PubMed:21647515};
DE   Flags: Fragment;
OS   Lathyrus sativus (White vetchling).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Fabeae; Lathyrus.
OX   NCBI_TaxID=3860;
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, FUNCTION, AND MASS SPECTROMETRY.
RC   TISSUE=Seed {ECO:0000269|PubMed:21647515};
RX   PubMed=21647515; DOI=10.1039/c1mb05141e;
RA   Rocco M., Malorni L., Chambery A., Poerio E., Parente A., Di Maro A.;
RT   "A Bowman-Birk inhibitor with anti-elastase activity from Lathyrus sativus
RT   L. seeds.";
RL   Mol. Biosyst. 7:2500-2507(2011).
CC   -!- FUNCTION: Inhibits trypsin (IC(50)=17.60 nM) and, to a lesser extent,
CC       alpha-chymotrypsin (IC(50)=2.38 uM). {ECO:0000269|PubMed:21647515}.
CC   -!- MASS SPECTROMETRY: Mass=7460.01; Method=Electrospray;
CC       Evidence={ECO:0000269|PubMed:21647515};
CC   -!- SIMILARITY: Belongs to the Bowman-Birk serine protease inhibitor
CC       family. {ECO:0000255}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   AlphaFoldDB; B3EWN8; -.
DR   SMR; B3EWN8; -.
DR   GO; GO:0005576; C:extracellular region; IEA:InterPro.
DR   GO; GO:0004867; F:serine-type endopeptidase inhibitor activity; IDA:UniProtKB.
DR   GO; GO:0010951; P:negative regulation of endopeptidase activity; IDA:UniProtKB.
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; 1.
DR   SUPFAM; SSF57247; SSF57247; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Protease inhibitor;
KW   Serine protease inhibitor.
FT   CHAIN           1..>30
FT                   /note="Bowman-Birk type proteinase inhibitor 4"
FT                   /id="PRO_0000419011"
FT   SITE            16..17
FT                   /note="Reactive bond for trypsin"
FT                   /evidence="ECO:0000250|UniProtKB:P01055"
FT   DISULFID        8..?
FT                   /evidence="ECO:0000250|UniProtKB:P01055"
FT   DISULFID        9..24
FT                   /evidence="ECO:0000250|UniProtKB:P01055"
FT   DISULFID        12..?
FT                   /evidence="ECO:0000250|UniProtKB:P01055"
FT   DISULFID        14..22
FT                   /evidence="ECO:0000250|UniProtKB:P01055"
FT   NON_TER         30
FT                   /evidence="ECO:0000303|PubMed:21647515"
SQ   SEQUENCE   30 AA;  3247 MW;  9A5B6616C3043C22 CRC64;
     GDDVKSACCD TCLCTKSNPP ICRCVDIRET