PMID- 10417275 OWN - NLM STAT- MEDLINE DCOM- 19990820 LR - 20200824 IS - 0002-9297 (Print) IS - 1537-6605 (Electronic) IS - 0002-9297 (Linking) VI - 65 IP - 2 DP - 1999 Aug TI - Identification of a mutation cluster in mevalonate kinase deficiency, including a new mutation in a patient of Mennonite ancestry. PG - 327-35 AB - Mevalonate kinase (MKase) deficiency (MKD) is a rare autosomal recessive disorder in the pathway of cholesterol and nonsterol isoprenoid biosynthesis. Thus far, two disease-causing missense alleles have been identified, N301T and A334T. We report four additional mutations associated with MKD: L264F, T243I, L265P, and I268T, the last found in a patient of Mennonite ancestry. Electrophoretic analysis of bacterially expressed wild-type and mutant MKase indicated that I268T and T243I mutants produced normal or somewhat reduced amounts of MKase protein; conversely, L264F and L265P mutations resulted in considerably decreased, or absent, MKase protein. Immunoblot analysis of MKase from all patients suggested that the MKase polypeptide was grossly intact and produced in amounts comparable to control levels. Three mutations resulted in significantly diminished MKase enzyme activity (<2%), whereas the I268T allele yielded approximately 20% residual enzyme activity. Our results should allow more-accurate identification of carriers and indicate a mutation "cluster" within amino acids 240-270 of the mature MKase polypeptide. FAU - Hinson, D D AU - Hinson DD AD - Institute of Metabolic Disease, Baylor University Medical Center, Dallas, TX, USA. FAU - Ross, R M AU - Ross RM FAU - Krisans, S AU - Krisans S FAU - Shaw, J L AU - Shaw JL FAU - Kozich, V AU - Kozich V FAU - Rolland, M O AU - Rolland MO FAU - Divry, P AU - Divry P FAU - Mancini, J AU - Mancini J FAU - Hoffmann, G F AU - Hoffmann GF FAU - Gibson, K M AU - Gibson KM LA - eng SI - OMIM/251170 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (Recombinant Fusion Proteins) RN - EC 2.7.1.- (Phosphotransferases (Alcohol Group Acceptor)) RN - EC 2.7.1.36 (mevalonate kinase) SB - IM MH - Alleles MH - Amino Acid Sequence MH - Amino Acid Substitution MH - Cells, Cultured MH - Christianity MH - DNA Mutational Analysis MH - Escherichia coli/genetics MH - Female MH - Fibroblasts/enzymology/metabolism MH - Humans MH - Lymphocytes/enzymology/metabolism MH - Male MH - Metabolism, Inborn Errors/enzymology/*genetics MH - Molecular Sequence Data MH - Mutation/genetics MH - Nuclear Family MH - Pedigree MH - Phosphotransferases (Alcohol Group Acceptor)/*deficiency/*genetics/isolation & purification/metabolism MH - Recombinant Fusion Proteins/biosynthesis/genetics/isolation & purification/metabolism MH - Sequence Alignment PMC - PMC1377931 EDAT- 1999/07/27 10:00 MHDA- 2000/03/21 09:00 CRDT- 1999/07/27 10:00 PHST- 1999/07/27 10:00 [pubmed] PHST- 2000/03/21 09:00 [medline] PHST- 1999/07/27 10:00 [entrez] AID - S0002-9297(07)62049-7 [pii] AID - 10.1086/302489 [doi] PST - ppublish SO - Am J Hum Genet. 1999 Aug;65(2):327-35. doi: 10.1086/302489.