ITR5_LUFAE
ID ITR5_LUFAE Reviewed; 63 AA.
AC P34950;
DT 01-FEB-1994, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-1994, sequence version 1.
DT 25-MAY-2022, entry version 83.
DE RecName: Full=Trypsin inhibitor 5;
DE AltName: Full=TGT-II;
DE AltName: Full=Trypsin inhibitor II;
DE Flags: Precursor;
OS Luffa aegyptiaca (Sponge gourd) (Luffa cylindrica).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC rosids; fabids; Cucurbitales; Cucurbitaceae; Sicyoeae; Luffa.
OX NCBI_TaxID=3670;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA], AND PARTIAL PROTEIN SEQUENCE.
RX PubMed=8419358; DOI=10.1016/s0021-9258(18)54006-0;
RA Ling M.-H., Qi H.-Y., Chi C.-W.;
RT "Protein, cDNA, and genomic DNA sequences of the towel gourd trypsin
RT inhibitor. A squash family inhibitor.";
RL J. Biol. Chem. 268:810-814(1993).
CC -!- FUNCTION: Inhibits trypsin.
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 EMBL; M98055; AAA33407.1; -; mRNA.
DR PIR; A45041; A45041.
DR AlphaFoldDB; P34950; -.
DR SMR; P34950; -.
DR MEROPS; I07.011; -.
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 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 Secreted; Serine protease inhibitor; Signal.
FT SIGNAL 1..21
FT /evidence="ECO:0000255"
FT PROPEP 22..34
FT /evidence="ECO:0000255"
FT /id="PRO_0000033208"
FT PEPTIDE 35..63
FT /note="Trypsin inhibitor 5"
FT /id="PRO_0000033209"
FT SITE 39..40
FT /note="Reactive bond"
FT DISULFID 37..54
FT /evidence="ECO:0000250"
FT DISULFID 44..56
FT /evidence="ECO:0000250"
FT DISULFID 50..62
FT /evidence="ECO:0000250"
SQ SEQUENCE 63 AA; 6691 MW; 88E656B70A287CF6 CRC64;
MASVAESSGV VEVIELISDG GNDLPRKIMS GRHGGICPRI LMPCKTDDDC MLDCRCLSNG
YCG