NDLI: A Specific Region of 37 Amino Acid Residues in the SPRY (B30.2) Domain of African Green Monkey TRIM5α Determines Species-Specific Restriction of Simian Immunodeficiency Virus SIVmac Infection

Content Provider	PubMed Central
Author	Nakayama, Emi E. Miyoshi, Hiroyuki Nagai, Yoshiyuki Shioda, Tatsuo
Copyright Year	2005
Abstract	Human immunodeficiency virus type 1 (HIV-1) efficiently enters cells of Old World monkeys but encounters a block before reverse transcription. This restriction is mediated by a dominant repressive factor. Recently, a member of the tripartite motif (TRIM) family proteins, TRIM5α, was identified as a blocking factor in a rhesus macaque cDNA library. Among Old World monkey cell lines, the African green monkey kidney cell line CV1 is highly resistant to not only HIV-1 but also simian immunodeficiency virus SIVmac infection. We analyzed TRIM5α of CV1 cells and HSC-F cells, a T-cell line from a cynomolgus monkey, and found that both CV1- and HSC-F-TRIM5αs could inhibit CD4-dependent HIV-1 infection, as well as vesicular stomatitis virus glycoprotein-mediated infection. CV1-TRIM5α could also inhibit SIVmac infection, whereas HSC-F-TRIM5α could not. In the SPRY (B30.2) domain of CV1-TRIM5α, there was a 20-amino-acid duplication that was not present in HSC-F-TRIM5α. A chimeric TRIM5α containing 37 amino acid residues from CV1-TRIM5α, which spanned the 20-amino-acid duplication, in the background of HSC-F-TRIM5α fully gained the ability to inhibit SIVmac infection. Conversely, the mutant CV1-TRIM5α lacking the 20-amino-acid duplication completely lost the ability to restrict SIVmac infection. These findings clearly indicated that a specific region of 37 amino acid residues in the SPRY domain of CV1-TRIM5α contained a determinant of species-specific restriction of SIVmac.
Related Links	http://dx.doi.org/10.1128/jvi.79.14.8870-8877.2005
Ending Page	8877
Page Count	8
Starting Page	8870
File Format	PDF
ISSN	0022538X
e-ISSN	10985514
Journal	Journal of Virology
Issue Number	14
Volume Number	79
Language	English
Publisher	American Society for Microbiology
Publisher Date	2005-07-15
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Virology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Virology Immunology Microbiology Insect Science

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