title: [Genotype polymorphism and its implications of mannose-binding protein allele in 5 Chinese nationalities].
abstract: OBJECTIVE
  To detect the genotypes and sequences of the exon 1 of human mannose-binding protein (MBP) allele in 5 Chinese nationalities.
  
  
  METHODS
  The genotypes of MBP gene of 5 Chinese nationalities were detected by polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP). The exon 1 of the MBP gene of 22 Chinese Hans was analyzed by using ABI 310 genetic analyzer.
  
  
  RESULTS
  The DNA sequences of exon 1 of Chinese MBP gene were acquired. The allele frequencies of the codon 54 of the MBP gene (MBP-54) of 5 Chinese nationalities were 0.181(Hans), 0.128(Uygurs), 0.181(Mongols), 0.179(Tibetans) and 0.181(Yis). The allele distribution for MBP-54 mutation of 5 Chinese nationalities was in good agreement with Hardy-Weinberg equilibrium. Compared with the Hans, Uygurs had a lower MBP-54 mutation rate. There were no differences in the allele frequencies between the chronic hepatitis B patients and health controls in Chinese Hans. The mutations of the codons 52 and 57 were not detected in this study.
  
  
  CONCLUSIONS
  A higher prevalence of MBP-54 mutation was found in 5 Chinese nationalities, MBP-54 mutation was not associated with the persistence of hepatitis B.
authors.affiliation: Division of Bioengineering, 302 Hospital of PLA, Beijing 100039 P. R. China. fswang@public.bta.net.cn
authors.forename: H
authors.initials: H
authors.lastname: Shi
authors.forename: F
authors.initials: F
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Jin
authors.forename: M
authors.initials: M
authors.lastname: Liu
authors.forename: W
authors.initials: W
authors.lastname: Hong
authors.forename: Q
authors.initials: Q
authors.lastname: Du
authors.forename: Z
authors.initials: Z
authors.lastname: Lei
authors.forename: J
authors.initials: J
authors.lastname: Hou
authors.forename: M
authors.initials: M
authors.lastname: Shi
authors.forename: L
authors.initials: L
authors.lastname: Xing
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics*; D002648:Child; D002675:Child, Preschool; D002681:China / Q000208:ethnology; D037222:Collectins; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic
chemical_list: D002352:Carrier Proteins; D037222:Collectins