SPI3_SOLTU
ID SPI3_SOLTU Reviewed; 21 AA.
AC P58516;
DT 23-JAN-2002, integrated into UniProtKB/Swiss-Prot.
DT 23-JAN-2002, sequence version 1.
DT 25-MAY-2022, entry version 43.
DE RecName: Full=Serine protease inhibitor 3;
DE AltName: Full=PSPI-22;
DE Flags: Fragment;
OS Solanum tuberosum (Potato).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC asterids; lamiids; Solanales; Solanaceae; Solanoideae; Solaneae; Solanum.
OX NCBI_TaxID=4113;
RN [1]
RP PROTEIN SEQUENCE.
RC STRAIN=cv. Istrinskii;
RX PubMed=9598993; DOI=10.1016/s0014-5793(98)00321-4;
RA Valueva T.A., Revina T.A., Kladnitskaya G.V., Mosolov V.V.;
RT "Kunitz-type proteinase inhibitors from intact and Phytophthora-infected
RT potato tubers.";
RL FEBS Lett. 426:131-134(1998).
CC -!- FUNCTION: Inhibits trypsin and chymotrypsin (serine proteases). Does
CC not inhibit elastase, subtilisin, cathepsin L nor papain (serine and
CC cysteine proteases). Protects the plant by inhibiting proteases of
CC invading organisms, decreasing both hyphal growth and zoospores
CC germination of Phytophthora infestans.
CC -!- SUBCELLULAR LOCATION: Vacuole {ECO:0000250}.
CC -!- TISSUE SPECIFICITY: Tubers.
CC -!- INDUCTION: By infection with Phytophthora infestans.
CC -!- MISCELLANEOUS: Has a single chain structure.
CC -!- SIMILARITY: Belongs to the protease inhibitor I3 (leguminous Kunitz-
CC type inhibitor) family. {ECO:0000305}.
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DR AlphaFoldDB; P58516; -.
DR ProMEX; P58516; -.
DR Proteomes; UP000011115; Unassembled WGS sequence.
DR GO; GO:0005773; C:vacuole; IEA:UniProtKB-SubCell.
DR GO; GO:0004867; F:serine-type endopeptidase inhibitor activity; IEA:UniProtKB-KW.
PE 1: Evidence at protein level;
KW Direct protein sequencing; Protease inhibitor; Reference proteome;
KW Serine protease inhibitor; Vacuole.
FT CHAIN 1..>21
FT /note="Serine protease inhibitor 3"
FT /id="PRO_0000083308"
FT NON_TER 21
SQ SEQUENCE 21 AA; 2439 MW; 5674BEAB7149147D CRC64;
FVLPFDVLDS GRDLDRGWPY A