PMID- 16777063 OWN - NLM STAT- MEDLINE DCOM- 20060821 LR - 20081121 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 346 IP - 3 DP - 2006 Aug 4 TI - Purification and characterization of a heat-stable serine protease inhibitor from the tubers of new potato variety "Golden Valley". PG - 681-6 AB - Potide-G, a small (5578.9 Da) antimicrobial peptide, was isolated from potato tubers (Solanum tuberosum L. cv. Golden Valley) through extraction of the water-soluble fraction, dialysis, ultrafiltration and DEAE-cellulose and C18 reverse-phase high performance liquid chromatography. This antimicrobial peptide was heat-stable and almost completely suppressed the proteolytic activity of trypsin, chymotrypsin and papain, with no hemolytic activity. In addition, potide-G potently inhibited growth of a variety of bacterial (Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Clavibacter michiganense subsp. michiganinse) and fungal (Candida albicans and Rhizoctonia solani) strains. Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry revealed that the N-terminal sequence (residues from 1 to 11) of the protein is identical to that of potato proteinase inhibitor, a member of the Kunitz superfamily. And like other members of this class of protease inhibitor, potide-G may have a number of beneficial and therapeutic uses. FAU - Kim, Mi-Hyun AU - Kim MH AD - Research Center for Proteineous Materials, Chosun University, Kwangju 501-759, Republic of Korea. FAU - Park, Seong-Cheol AU - Park SC FAU - Kim, Jin-Young AU - Kim JY FAU - Lee, Sun Young AU - Lee SY FAU - Lim, Hak-Tae AU - Lim HT FAU - Cheong, Hyeonsook AU - Cheong H FAU - Hahm, Kyung-Soo AU - Hahm KS FAU - Park, Yoonkyung AU - Park Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060609 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Anti-Bacterial Agents) RN - 0 (Antifungal Agents) RN - 0 (Plant Proteins) RN - 0 (Serine Proteinase Inhibitors) SB - IM MH - Amino Acid Sequence MH - Anti-Bacterial Agents/chemistry/isolation & purification/metabolism/pharmacology MH - Antifungal Agents/chemistry/isolation & purification/metabolism/pharmacology MH - Erythrocytes/cytology/drug effects MH - Hemolysis/drug effects MH - Hot Temperature MH - Humans MH - Molecular Sequence Data MH - Molecular Weight MH - Plant Proteins/*chemistry/*isolation & purification/pharmacology MH - Plant Tubers/*chemistry MH - Sequence Alignment MH - Serine Proteinase Inhibitors/chemistry/*isolation & purification/*pharmacology MH - Solanum tuberosum/*chemistry/*classification MH - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization EDAT- 2006/06/17 09:00 MHDA- 2006/08/22 09:00 CRDT- 2006/06/17 09:00 PHST- 2006/05/18 00:00 [received] PHST- 2006/05/22 00:00 [accepted] PHST- 2006/06/17 09:00 [pubmed] PHST- 2006/08/22 09:00 [medline] PHST- 2006/06/17 09:00 [entrez] AID - S0006-291X(06)01201-0 [pii] AID - 10.1016/j.bbrc.2006.05.186 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2006 Aug 4;346(3):681-6. doi: 10.1016/j.bbrc.2006.05.186. Epub 2006 Jun 9.