title: [Single nucleotide polymorphism loci of HIV-1 coreceptor CCR5 gene in Chinese Han people].
abstract: OBJECTIVE
  To investigate the single nucleotide polymorphism(SNP) loci of HIV-1 coreceptor CCR5 gene in Chinese Han people.
  
  
  METHODS
  The coding region of CCR5 was amplified using 2 pairs of primers and the PCR products of all 42 healthy subjects were sequenced by 4 different primers. The results of sequencing were analyzed by DNAstar in search of SNP loci.
  
  
  RESULTS
  Six SNP loci were discovered in the coding region of CCR5, among them four SNPs, i.e. 184A-->G, 503G-->T, 688G-->A and 999G-->T, cause amino acids changes and two SNPs are nonsense mutations. One cytosine deletion at the 894nt results in frame shift mutation and prematured termination. 184A-->G, 503G-->T and 999G-->T were found in Chinese Han people for the first time. The allelic frequencies of mutant 184G, 503T and 999T alleles were 1.1%, 21.1% and 10.0% in healthy Hans, respectively. The population distribution of G503T markedly deviated from Hardy-Weinberg equilibrium.
  
  
  CONCLUSIONS
  The SNP loci in the coding region of CCR5 in Chinese Han people has its own characteristics, which is not consistent with those of Japanese and obviously different from those of Caucasian and African.
authors.affiliation: PLA Key Laboratory for Prevention and Therapy of Hepatitis AIDS, 302 Hospital of PLA, Beijing, PR China.
authors.forename: Ming-xu
authors.initials: MX
authors.lastname: Liu
authors.forename: Fu-sheng
authors.initials: FS
authors.lastname: Wang
authors.forename: Wei-guo
authors.initials: WG
authors.lastname: Hong
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Jin
authors.forename: Zhou-yun
authors.initials: ZY
authors.lastname: Lei
authors.forename: Jing
authors.initials: J
authors.lastname: Hou
mesh_terms: D000328:Adult; D001483:Base Sequence; D002681:China; D004247:DNA / Q000737:chemistry / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D005787:Gene Frequency; D015497:HIV-1 / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D017354:Point Mutation; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D019713:Receptors, CCR5 / Q000235:genetics* / Q000378:metabolism; D017384:Sequence Deletion
chemical_list: D019713:Receptors, CCR5; D004247:DNA