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Journal of Bacteriology, August 2003, p. 4662-4665, Vol. 185, No. 15
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.15.4662-4665.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Methanococcus jannaschii Coenzyme F420 Analogs Contain a Terminal {alpha}-Linked Glutamate

Marion Graupner{dagger} and Robert H. White*

Department of Biochemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

Received 12 February 2003/ Accepted 12 May 2003

Analyses of the F420s present in Methanococcus jannaschii have shown that these cells contain a series of {gamma}-glutamyl-linked F420s capped with a single, terminal {alpha}-linked L-glutamate. The predominant form of F420 was designated as {alpha}-F420-3 and represented 86% of the F420s in these cells. Analyses of Methanosarcina thermophila, Methanosarcina barkeri, Methanobacterium thermoautotrophicum, Archaeoglobus fulgidus, and Mycobacterium smegmatis showed that they contained only {gamma}-glutamyl-linked F420s.

* Corresponding author. Mailing address: Department of Biochemistry (0308), Virginia Polytechnic Institute and State University, 111 Engel Hall (0308), Blacksburg, VA 24061. Phone: (540) 231-6605. Fax: (540) 231-9070. E-mail: rhwhite{at}vt.edu.

{dagger} Present address: Baxter AG, 1221 Vienna, Austria.

Journal of Bacteriology, August 2003, p. 4662-4665, Vol. 185, No. 15
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.15.4662-4665.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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