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Journal of Virology, January 2002, p. 656-661, Vol. 76, No. 2
0022-538X/01/$04.00+0     DOI: 10.1128/JVI.76.2.656-661.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Adenovirus Serotype 30 Fiber Does Not Mediate Transduction via the Coxsackie-Adenovirus Receptor

Lane K. Law1 and Beverly L. Davidson1,2*

Program in Gene Therapy, Program in Genetics,1 Departments of Internal Medicine, Neurology, and Physiology and Biophysics, University of Iowa College of Medicine, Iowa City, Iowa 522422

Received 26 June 2001/ Accepted 9 October 2001

Prior work by members of our laboratory and others demonstrated that adenovirus serotype 30 (Ad30), a group D adenovirus, exhibited novel transduction characteristics compared to those of serotype 5 (Ad5, belonging to group C). While some serotype D adenoviruses bind to the coxsackie-adenovirus receptor (CAR), the ability of Ad30 fiber to bind CAR is unknown. We amplified and purified Ad30 and cloned the Ad30 fiber by overlap PCR. Alignment of Ad30 fiber with Ad3, Ad35, Ad5, Ad9, and Ad17 revealed that Ad30, like Ad9 and Ad17, has a shortened fiber sequence relative to that of Ad5. The knob region of fiber was 45% identical to that of the Ad5 knob regions. We made a chimeric recombinant virus (Ad5GFPf30) in which the Ad5 fiber (amino acids [aa]47 to 582) was replaced with Ad30 fiber sequences (aa 46 to 372), and CAR-mediated viral entry was determined on CAR-expressing Chinese hamster ovary (CHO) cells. While CAR expression significantly increased Ad5GFP-mediated transduction in CHO cells (from 1 to 36%), it did not enhance Ad5GFPf30 gene transfer. Binding of radiolabeled Ad5GFPf30 or Ad30 wild-type virus was also not improved by the expression of CAR. These results suggest that Ad30 fiber is distinct from Ad5, Ad9, and Ad17 fibers in its inability to direct transduction via CAR.

* Corresponding author. Mailing address: 200 EMRB, University of Iowa College of Medicine, Iowa City, IA 52242. Phone: (319) 353-5511. Fax: (319) 353-5572. E-mail: beverly-davidson{at}uiowa.edu.

Journal of Virology, January 2002, p. 656-661, Vol. 76, No. 2
0022-538X/01/$04.00+0     DOI: 10.1128/JVI.76.2.656-661.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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