ID   IELI_MOMCH              Reviewed;          31 AA.
AC   P10296; Q9S8E3; Q9S8E4; Q9S8E5;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 2.
DT   25-MAY-2022, entry version 89.
DE   RecName: Full=Elastase inhibitor 4;
DE   AltName: Full=Elastase inhibitor IV;
DE   AltName: Full=MCEI-IV;
DE   Contains:
DE     RecName: Full=Elastase inhibitor 3;
DE     AltName: Full=Elastase inhibitor III;
DE     AltName: Full=MCEI-III;
DE   Contains:
DE     RecName: Full=Elastase inhibitor 2;
DE     AltName: Full=Elastase inhibitor II;
DE     AltName: Full=MCEI-II;
DE   Contains:
DE     RecName: Full=Elastase inhibitor 1;
DE     AltName: Full=Elastase inhibitor I;
DE     AltName: Full=MCEI-I;
OS   Momordica charantia (Bitter gourd) (Balsam pear).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Cucurbitales; Cucurbitaceae; Momordiceae; Momordica.
OX   NCBI_TaxID=3673;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=7608135; DOI=10.1093/jb/117.2.432;
RA   Hamato N., Koshiba T., Pham T.N., Tatsumi Y., Nakamura D., Takano R.,
RA   Hayashi K., Hong Y.M., Hara S.;
RT   "Trypsin and elastase inhibitors from bitter gourd (Momordica charantia
RT   LINN.) seeds: purification, amino acid sequences, and inhibitory activities
RT   of four new inhibitors.";
RL   J. Biochem. 117:432-437(1995).
RN   [2]
RP   PROTEIN SEQUENCE OF 4-31, AND DISULFIDE BONDS.
RC   TISSUE=Seed;
RX   PubMed=2738047; DOI=10.1093/oxfordjournals.jbchem.a122625;
RA   Hara S., Makino J., Ikenaka T.;
RT   "Amino acid sequences and disulfide bridges of serine proteinase inhibitors
RT   from bitter gourd (Momordica charantia LINN.) seeds.";
RL   J. Biochem. 105:88-92(1989).
CC   -!- FUNCTION: Inhibits elastase.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- DOMAIN: The presence of a 'disulfide through disulfide knot'
CC       structurally defines this protein as a knottin. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the protease inhibitor I7 (squash-type serine
CC       protease inhibitor) family. {ECO:0000305}.
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DR   PIR; JX0059; JX0059.
DR   AlphaFoldDB; P10296; -.
DR   SMR; P10296; -.
DR   MEROPS; I07.002; -.
DR   Proteomes; UP000504603; Unplaced.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0004867; F:serine-type endopeptidase inhibitor activity; IEA:UniProtKB-KW.
DR   CDD; cd00150; PlantTI; 1.
DR   InterPro; IPR000737; Prot_inh_squash.
DR   InterPro; IPR011052; Proteinase_amylase_inhib_sf.
DR   Pfam; PF00299; Squash; 1.
DR   PRINTS; PR00293; SQUASHINHBTR.
DR   SUPFAM; SSF57027; SSF57027; 1.
DR   PROSITE; PS00286; SQUASH_INHIBITOR; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Knottin; Protease inhibitor;
KW   Reference proteome; Secreted; Serine protease inhibitor.
FT   PEPTIDE         1..31
FT                   /note="Elastase inhibitor 4"
FT                   /id="PRO_0000033210"
FT   PEPTIDE         2..31
FT                   /note="Elastase inhibitor 3"
FT                   /id="PRO_0000033211"
FT   PEPTIDE         3..31
FT                   /note="Elastase inhibitor 2"
FT                   /id="PRO_0000033212"
FT   PEPTIDE         4..31
FT                   /note="Elastase inhibitor 1"
FT                   /id="PRO_0000033213"
FT   SITE            8..9
FT                   /note="Reactive bond"
FT   DISULFID        6..23
FT                   /evidence="ECO:0000250"
FT   DISULFID        13..25
FT                   /evidence="ECO:0000250"
FT   DISULFID        19..30
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   31 AA;  3556 MW;  8A6C63D26D61FE89 CRC64;
     EEERICPLIW MECKRDSDCL AQCICVDGHC G