TABLE 1.

Comparison of the amino acid sequences in the capsid protein βH-βI loop domains of cucumoviruses

Virus-strain (subgroup)a	βH-βI loop amino acid sequenceb	Reference
CMV-Fny (IA)	D-D-A-L-E-T-D-E	31
CMV-K (IB)	D-D-A-L-E-T-D-E	41
CMV-Q (II)	D-D-K-L-E-K-D-E	6
PSV-J (I)	D-D-T-L-E-D-D-E	20
PSV-W (II)	D-D-V-L-Q-A-D-E	17
PSV-Mi (III)	D-D-V-L-E-A-D-E	55
TAV-C	D-D-V-L-E-A-D-E	30

^aPSV, Peanut stunt virus; TAV, Tomato aspermy virus.

^bThe βH-βI loop is that observed in the structure of CMV strain Fny by Smith et al. (46). The corresponding domain in other cucumoviruses was identified in the alignment by Wikoff et al. (54). Amino acids conserved in the three viruses are shown in bold.