Multiple amino acids in the capsid structure of canine parvovirus coordinately determine the canine host range and specific antigenic and hemagglutination properties.

نویسندگان

  • S F Chang
  • J Y Sgro
  • C R Parrish
چکیده

Canine parvovirus (CPV) and feline panleukopenia virus (FPV) are over 98% similar in DNA sequence but have specific host range, antigenic, and hemagglutination (HA) properties which were located within the capsid protein gene. In vitro mutagenesis and recombination were used to prepare 16 different recombinant genomic clones, and viruses derived from those clones were analyzed for their in vitro host range, antigenic, and HA properties. The region of CPV from 59 to 91 map units determined the ability to replicate in canine cells. A complex series of interactions was observed among the individual sequence differences between 59 and 73 map units. The canine host range required that VP2 amino acids (aa) 93 and 323 both be the CPV sequence, and those two CPV sequences introduced alone into FPV greatly increased viral replication in canine cells. Changing any one of aa 93, 103, or 323 of CPV to the FPV sequence either greatly decreased replication in canine cells or resulted in an inviable plasmid. The Asn-Lys difference of aa 93 alone was responsible for the CPV-specific epitope recognized by monoclonal antibodies. An FPV-specific epitope was affected by aa 323. Amino acids 323 and 375 together determined the pH dependence of HA. Amino acids involved in the various specific properties were all around the threefold spikes of the viral particle.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Detection of a new canine parvovirus mutant in Iran

BACKGROUND: Canine Parvovirus (CPV) is one of the major causes of fatal gastroenteritis in young dogs. After emergence of CPV-2, two new variants were reported and named CPV-2a and CPV-2b. In 2001 the newest variant was reported and named CPV-2c. The difference between CPV strains is related to amino acid changes in viral capsid protein (VP2). OBJECTIVES: The aim of the present study was geneti...

متن کامل

Combinations of two capsid regions controlling canine host range determine canine transferrin receptor binding by canine and feline parvoviruses.

Feline panleukopenia virus (FPV) and its host range variant, canine parvovirus (CPV), can bind the feline transferrin receptor (TfR), while only CPV binds to the canine TfR. Introducing two CPV-specific changes into FPV (at VP2 residues 93 and 323) endowed that virus with the canine TfR binding property and allowed canine cell infection, although neither change alone altered either property. In...

متن کامل

Characterization of Iranian Isolates of Canine Parvovirus in Fecal Samples Using Polymerase Chain Reaction Assay

Despite the widespread prevalence of canine parvovirus disease (CPV) in Iranian dog population,molecular diagnosis of CPV variants, and investigation of the trends of its genetic changes is a new effort. Inthis study 50 samples from dogs suspicious of infection with clinical signs of diarrhea and vomiting, and 25samples from dogs suspected of infection with general symptoms su...

متن کامل

The role of evolutionary intermediates in the host adaptation of canine parvovirus.

The adaptation of viruses to new hosts is a poorly understood process likely involving a variety of viral structures and functions that allow efficient replication and spread. Canine parvovirus (CPV) emerged in the late 1970s as a host-range variant of a virus related to feline panleukopenia virus (FPV). Within a few years of its emergence in dogs, there was a worldwide replacement of the initi...

متن کامل

Identification of domains in canine parvovirus VP2 essential for the assembly of virus-like particles.

Canine parvovirus capsids are composed of 60 copies of VP2 and 6 to 10 copies of VPl. To locate essential sites of interaction between VP2 monomers, we have analyzed the effects of a number of VP2 deletion mutants representing the amino terminus and the four major loops of the surface, using as an assay the formation of virus-like particles (VLPs) expressed by recombinant baculoviruses. For the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of virology

دوره 66 12  شماره 

صفحات  -

تاریخ انتشار 1992