Cloning and polymorphism analysis of prion protein gene in domestic bactrian camel in China.
Up to now, little is known about the prion protein gene (PRNP) of domestic bactrian camels, and no polymorphisms of the bactrian camel PRNP have been analyzed or reported. In this study, we cloned and analyzed the PRNP sequences of 89 domestic bactrian camels. The results showed that the amino acid sequence of bactrian camel PrP starts with the consensus sequence MVKSH, with almost identical amino acid sequence to the PrP of dromedary camels. A four octapeptide PHGGGWGQ repeat region follows a nonapeptide (PQGGGGWGQ) in the N-terminal of deduced amino acid sequence from residues 54 to 95. Polymorphisms of PRNP in both species of camels were observed in codons 16(A→V), 17(M→T), 120(N→S), 176(R→K), 215(I→V), 234(S→Y), 237(Y→S), and 239(Q→G) by comparing with other ruminants. The PrP gene nucleotide sequence alignments of bactrian camels (HQ204566.1 and HQ204567.1) showed high identity with dromedary camel (99.2%, 99.1%), sheep (91.9%, 91.8%) and cattle (91.8%, 91.6%). This study provides valuable data for future research on susceptibility or resistance of camels to prion diseases.
National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, China.
Lihua
L
Xu
Zhuming
Z
Zhang
Ling
L
Wang
Dengzhen
D
Feng
Xiangmei
X
Zhou
Binrui
B
Xu
Deming
D
Zhao
D000818:Animals; D002162:Camelus / Q000235:genetics; D002681:China; D003001:Cloning, Molecular; D011110:Polymorphism, Genetic; D011328:Prions / Q000235:genetics*; D016415:Sequence Alignment
D011328:Prions