Turkish Journal of Biology
Cloning and sequencing of coat protein gene of Zucchini yellow mosaic virus isolated from squash and muskmelon in Turkey
The coat protein (CP) genes of the genomic RNA of 2 severe Turkish isolates of Zucchini yellow mosaic virus (ZYMV) from squash and muskmelon [ZYMV-Adana (Ad) and ZYMV-Ahlat (Ah), respectively] were cloned, and their complete nucleotide sequences and deduced amino acids were determined. The analysis revealed that both Turkish ZYMV-CP genes contained 837 nucleotides encoded for a CP of about 31.2 kDa. Phylogenetic trees based on nucleic acid sequences were constructed by the neighbor joining and unweighted pair group mean arithmetic (UPGMA) methods with 100 bootstrap replicates. A high degree of homology was detected between the 2 Turkish isolates on the nucleotide sequences (97%). The CP sequence of ZYMV-Ad and ZYMV-Ah varied among the 23 isolates with overall identity of 93%-98% and 94%-99%, respectively, at the nucleotide level. Comparison of the nucleotide sequences of 23 isolates from different geographical regions worldwide showed the ZYMV-Ad isolate clustered with isolates from Middle Eastern countries (Israel, Jordan, and Syria); ZYMV-Ah isolate was clustered with isolates from Far Eastern countries (Korea and Taiwan). The N-terminal of the Turkish ZYMV-Ah CP contained a distinctive sequence at nucleotide positions 9324-9328, which distinguished the Turkish ZYMV-Ah isolate from all previously reported ZYMV isolates. The CP cistron of the ZYMV-Ad and Ah isolates contained 279 amino acid residues. Pairwise nucleotide sequence comparison revealed sequence similarities of 58%-70% between ZYMV Turkish isolates and 22 other potyviruses. Mechanical inoculations showed that ZYMV-Ah produced faster systemic symptom induction than ZYMV-Ad on squash, suggesting that ZYMV-Ah was a more severe isolate than ZYMV-Ad (GenBank accession JF317296-JF317297).
ZYMV, characterization, coat protein, phylogenetic analysis
ÖZER, MERYEM; SİPAHİOĞLU, HİKMET MURAT; USTA, MUSTAFA; and FİDAN, HAKAN
"Cloning and sequencing of coat protein gene of Zucchini yellow mosaic virus isolated from squash and muskmelon in Turkey,"
Turkish Journal of Biology: Vol. 36:
4, Article 7.
Available at: https://journals.tubitak.gov.tr/biology/vol36/iss4/7