ID   SPOR2_IPOBA             Reviewed;         216 AA.
AC   P14716;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=Sporamin B;
DE   AltName: Full=Clone PIM0535;
DE   Flags: Precursor;
OS   Ipomoea batatas (Sweet potato) (Convolvulus batatas).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Convolvulaceae; Ipomoeeae; Ipomoea.
OX   NCBI_TaxID=4120;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. Kokei No. 14; TISSUE=Tuberous root;
RX   PubMed=2491673; DOI=10.1007/bf00027316;
RA   Hattori T., Yoshida N., Nakamura K.;
RT   "Structural relationship among the members of a multigene family coding for
RT   the sweet potato tuberous root storage protein.";
RL   Plant Mol. Biol. 13:563-572(1989).
CC   -!- FUNCTION: Major tuberous root protein.
CC   -!- SUBCELLULAR LOCATION: Vacuole.
CC   -!- TISSUE SPECIFICITY: Accumulates specifically in tuberous roots and
CC       tubers upon tuberization. Sporamin accounts 60 to 80% of the total
CC       soluble protein of the organ.
CC   -!- SIMILARITY: Belongs to the protease inhibitor I3 (leguminous Kunitz-
CC       type inhibitor) family. {ECO:0000305}.
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DR   EMBL; X15094; CAA33198.1; -; mRNA.
DR   PIR; S07466; S07466.
DR   AlphaFoldDB; P14716; -.
DR   SMR; P14716; -.
DR   MEROPS; I03.013; -.
DR   GO; GO:0005773; C:vacuole; IEA:UniProtKB-SubCell.
DR   GO; GO:0004866; F:endopeptidase inhibitor activity; IEA:InterPro.
DR   GO; GO:0045735; F:nutrient reservoir activity; IEA:UniProtKB-KW.
DR   CDD; cd00178; STI; 1.
DR   InterPro; IPR011065; Kunitz_inhibitor_STI-like_sf.
DR   InterPro; IPR002160; Prot_inh_Kunz-lg.
DR   PANTHER; PTHR33107; PTHR33107; 1.
DR   Pfam; PF00197; Kunitz_legume; 1.
DR   PRINTS; PR00291; KUNITZINHBTR.
DR   SMART; SM00452; STI; 1.
DR   SUPFAM; SSF50386; SSF50386; 1.
DR   PROSITE; PS00283; SOYBEAN_KUNITZ; 1.
PE   2: Evidence at transcript level;
KW   Signal; Storage protein; Vacuole.
FT   SIGNAL          1..21
FT                   /evidence="ECO:0000255"
FT   CHAIN           22..216
FT                   /note="Sporamin B"
FT                   /id="PRO_0000016940"
SQ   SEQUENCE   216 AA;  24032 MW;  D625C79CE1684C7F CRC64;
     MKAFALFFVL SLYLLPNPTH SKFNPIRLRP AHETASSETP VLDINGDEVR AGENYYMVSA
     IWGAGGGGLR LVRLDSSSNE CASDVIVSRS DFDNGDPITI TPADPEATVV MPSTYQTFRF
     NIATNKLCVN NVNWGIKHDS ESGQYFVKAG EFVSDNSNQF KIEVVNDNLN AYKISYCQFG
     TEKCFNVGRY YDPLTRATRL ALSNIPFVFV IKPTDM