Molecular cloning and sequencing of the cDNA encoding the bat CD4.
Chiroptera is thought to be a vector or a natural reservoir of various pathogenic microbes. However, there are few basic studies on the subject of chiroptera immune systems. This is the first report to determine the sequence of bat CD4 cDNA. Comparison with other animals' CD4 and phylogenetic analysis have shown that bat CD4 had a higher homology to cat and dog CD4 than to human and mouse CD4. Moreover, from the analysis of the structure of the CD4 Ig-like C-type 1 region, in bat CD4 there was an insertion of 18 extra amino acids. In addition, bat CD4 lacked cystein, which suggested that the disulfide bond could not be formed. Human, monkey and mouse CD4 have the cystein and the disulfide bond, but pig, cat, whale and dog CD4, like that of the bat, lacked the cystein. We conducted the present study in order to help elucidate the infectious diseases derived from the bat as well as bat immune systems.
Omatsu
Tsutomu
T
Department of Biomedical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Tokyo 113-8657, Japan. aa37157@mail.ecc.u-tokyo.ac.jp
Nishimura
Yorihiro
Y
Bak
Eun Jung
EJ
Ishii
Yoshiyuki
Y
Tohya
Yukinobu
Y
Kyuwa
Shigeru
S
Akashi
Hiroomi
H
Yoshikawa
Yasuhiro
Y
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015704:CD4 Antigens / Q000235:genetics*; D002685:Chiroptera / Q000235:genetics* / Q000276:immunology; D003001:Cloning, Molecular; D008969:Molecular Sequence Data; D010802:Phylogeny; D012313:RNA / Q000737:chemistry / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
D015704:CD4 Antigens; D012313:RNA