HCMV Mutation Detail Information

Virus Mutation HCMV Mutation G987A


Basic Characteristics of Mutations
Mutation Site G987A
Mutation Site Sentence Sequence analysis of the 4.1-kb region revealed a single nucleotide change that resulted in a glycine-to-alanine substitution at position 987 within conserved region V of the DNA polymerase.
Mutation Level Amino acid level
Mutation Type Nonsynonymous substitution
Gene/Protein/Region Pol
Standardized Encoding Gene UL54  
Genotype/Subtype -
Viral Reference AD169
Functional Impact and Mechanisms
Disease Cell line    
Immune -
Target Gene -
Clinical and Epidemiological Correlations
Clinical Information -
Treatment ganciclovir;phosphonylmethoxyalkyl derivatives
Location -
Literature Information
PMID 8381637
Title A point mutation in the human cytomegalovirus DNA polymerase gene confers resistance to ganciclovir and phosphonylmethoxyalkyl derivatives
Author Sullivan V,Biron KK,Talarico C,Stanat SC,Davis M,Pozzi LM,Coen DM
Journal Antimicrobial agents and chemotherapy
Journal Info 1993 Jan;37(1):19-25
Abstract Ganciclovir-resistant mutant 759rD100 derived from human cytomegalovirus strain AD169 contains two resistance mutations, one of which is in the UL97 gene and results in decreased ganciclovir phosphorylation in infected cells [V. Sullivan, C. L. Talarico, S. C. Stanat, M. Davis, D. M. Coen, and K. K. Biron, Nature (London) 358:162-164, 1992]. In the present study, we mapped the second mutation to a 4.1-kb DNA fragment containing the DNA polymerase gene and showed that it confers ganciclovir resistance without impairing phosphorylation. Sequence analysis of the 4.1-kb region revealed a single nucleotide change that resulted in a glycine-to-alanine substitution at position 987 within conserved region V of the DNA polymerase. Recombinant viruses constructed to contain the DNA polymerase mutation but not the phosphorylation defect displayed intermediate resistance (4- to 6-fold) to ganciclovir relative to the original mutant 759rD100 (22-fold); the recombinant viruses also displayed resistance to ganciclovir cyclic phosphate (7-fold), 1-(dihydroxy-2-propoxymethyl)-cytosine (12-fold), and the phosphonylmethoxyalkyl derivatives (S)-1-(3-hydroxy-2-phosphonylmethoxypropyl)adenine and (S)-1-(3-hydroxy-2-phosphonylmethoxypropyl)cytosine (8- to 10-fold). However, the recombinant viruses remained susceptible to certain related compounds. These results imply that the human cytomegalovirus DNA polymerase is a selective target for the antiviral activities of ganciclovir, certain of its derivatives and phosphonomethoxyalkyl derivatives; support a role for region V in substrate recognition; and suggest the possibility of clinical resistance of human cytomegalovirus to these compounds because of polymerase mutations.
Sequence Data -
Mutation Information
Note
Basic Characteristics of Mutations
  • Mutation Site: The specific location in a gene or protein sequence where a change occurs.
  • Mutation Level: The level at which a mutation occurs, including the nucleotide or amino acid level.
  • Mutation Type: The nature of the mutation, such as missense mutation, nonsense mutation, synonymous mutation, etc.
  • Gene/Protein/Region: Refers to the specific region of the virus where the mutation occurs. Including viral genes, viral proteins, or a specific viral genome region. If the article does not specifically indicate the relationship between the mutation and its correspondence, the main
  • Gene/Protein/Region studied in the article is marked.
  • Genotype/Subtype: Refers to the viral genotype or subtype where the mutation occurs. If the article does not specifically indicate the relationship between the mutation and its correspondence, the main Genotype/Subtype studied in the article is marked.
  • Viral Reference: Refers to the standard virus strain used to compare and analyze viral sequences.
Functional Impact and Mechanisms
  • Disease: An abnormal physiological state with specific symptoms and signs caused by viral infection.
  • Immune: The article focuses on the study of mutations and immune.
  • Target Gene: Host genes that viral mutations may affect.
Clinical and Epidemiological Correlations
  • Clinical Information: The study is a clinical or epidemiological study and provides basic information about the population.
  • Treatment: The study mentioned a certain treatment method, such as drug resistance caused by mutations. If the study does not specifically indicate the relationship between mutations and their correspondence treatment, the main treatment studied in the article is marked.
  • Location: The source of the research data.
Literature Information
  • Sequence Data: The study provides the data accession number.