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Cloning, Expression, and Characterization of Protein Carboxyl O-methyltransferase from Porcine Brain

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dc.contributor.author고은진-
dc.date.accessioned2016-02-19T11:28:43Z-
dc.date.available2016-02-19T11:28:43Z-
dc.date.issued2001-
dc.identifier.issn1225-8687-
dc.identifier.urihttps://ir.ymlib.yonsei.ac.kr/handle/22282913/143229-
dc.description.abstractProtein carboxyl O-methyltransferase (E.C.2.1.1.24) may play a role in the repair of aged protein that is spontaneously incorporated with isoaspartyl residues. The porcine brain carboxyl O-methyltransferase was cloned in the pET32 vector, and overexpressed in E.coli (BL21) that harbors pETPCMT, which encodes 227 amino acids, including tagging proteins at the N-terminus. The protein sequence of the cloned porcine brain PCMT (r-pbPCMT) shares a 98% identity with that of human erythrocyte PCMT and rat brain PCMT. It is 100% identical with that of bovine brain. The r-pbPCMT was purified using Ni-NTA affinity chromatography and digested by enterokinase in order to remove the protein tags. Then Superdex 75HR gel filtration chromatography was performed. The r-pbPCMT exhibited similar in vitro substrate specificities with the PCMT that was purified from porcine brain. The molecular weight of the enzyme was estimated to be 24.5 kDa on the SDS polyacrylamidegel electrophoresis. The Km value was 1.1 ×10-7M for S-adenosyl-L-methionine. S-adnosyl-L-homocysteine was a competitive type of inhibitor with the Ki value of 1.38 ×10-4M. The enzyme has optimal activity at pH 6.0 and 37℃. These results indicate that the expressed enzyme is functionally similar to the natural protein. It also suggests that it may be a suitable model to further understand the function of the mammalian enzyme.-
dc.description.statementOfResponsibilityopen-
dc.format.extent559~565-
dc.relation.isPartOfJOURNAL OF BIOCHEMISTRY AND MOLECULAR BIOLOGY-
dc.rightsCC BY-NC-ND 2.0 KR-
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/2.0/kr/-
dc.titleCloning, Expression, and Characterization of Protein Carboxyl O-methyltransferase from Porcine Brain-
dc.typeArticle-
dc.contributor.collegeCollege of Medicine (의과대학)-
dc.contributor.departmentDept. of Biochemistry & Molecular Biology (생화학,분자생물학)-
dc.contributor.googleauthorKoh Eun-Jin-
dc.contributor.googleauthorShim Ki-Shuk-
dc.contributor.googleauthorKim Hyun-Kyu-
dc.contributor.googleauthorPark Ki-Moon-
dc.contributor.googleauthorLee Suk-Chan-
dc.contributor.googleauthorKim Jung-Dong-
dc.contributor.googleauthorYoo Sun-Dong-
dc.contributor.googleauthorChi Sang-Chul-
dc.contributor.googleauthorHong Sung-Youl-
dc.admin.authorfalse-
dc.admin.mappingfalse-
dc.contributor.localIdA00139-
dc.relation.journalcodeJ01257-
dc.identifier.eissn0219-1024-
dc.subject.keywordCloning-
dc.subject.keywordExpression-
dc.subject.keywordPorcine brain protein carboxyl O-methyltransferase-
dc.contributor.alternativeNameKoh, Eun Jin-
dc.contributor.affiliatedAuthorKoh, Eun Jin-
dc.rights.accessRightsfree-
dc.citation.volume34-
dc.citation.number6-
dc.citation.startPage559-
dc.citation.endPage565-
dc.identifier.bibliographicCitationJOURNAL OF BIOCHEMISTRY AND MOLECULAR BIOLOGY , Vol.34(6) : 559-565, 2001-
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Biochemistry and Molecular Biology (생화학-분자생물학교실) > 1. Journal Papers

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