Originally published In Press as doi:10.1074/mcp.M500312-MCP200 on February 2, 2006.
Molecular & Cellular Proteomics 5:811-823, 2006.
© 2006 by The American Society for Biochemistry and Molecular Biology, Inc.
Research
Proteome Analysis of an Aerobic Hyperthermophilic Crenarchaeon, Aeropyrum pernix K1*,S
Syuji Yamazaki ,
Jun Yamazaki,
Keiko Nishijima,
Rie Otsuka,
Miyako Mise,
Hanako Ishikawa,
Kazumi Sasaki,
Shin-ichi Tago and
Katsumi Isono
From the Department of Biotechnology, Genome Analysis Division, National Institute of Technology and Evaluation (NITE), 2-49-10 Nishihara, Shibuya, Tokyo 151-0066, Japan
We analyzed the proteome of a crenararchaeon, Aeropyrum pernix K1, by using the following four methods: (i) two-dimensional PAGE followed by MALDI-TOF MS, (ii) one-dimensional SDS-PAGE in combination with two-dimensional LC-MS/MS, (iii) multidimensional LC-MS/MS, and (iv) two-dimensional PAGE followed by amino-terminal amino acid sequencing. These methods were found to be complementary to each other, and biases in the data obtained in one method could largely be compensated by the data obtained in the other methods. Consequently a total of 704 proteins were successfully identified, 134 of which were unique to A. pernix K1, and 19 were not described previously in the genomic annotation. We found that the original annotation of the genomic data of this archaeon was not adequate in particular with respect to proteins of 1020 kDa in size, many of which were described as hypothetical. Furthermore the amino-terminal amino acid sequence analysis indicated that surprisingly the translation of 52% of their genes starts with TTG in contrast to ATG (28%) and GTG (20%). Thus, A. pernix K1 is the first example of an organism in which TTG is the most predominant translational initiation codon.
To whom correspondence should be addressed. Tel.: 81-3-3481-1936; Fax: 81-3-3481-8951; E-mail: yamazaki-shuji{at}nite.go.jp

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Copyright © 2006 by the American Society for Biochemistry and Molecular Biology.
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