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High nucleotide and amino acid sequence similarities in tumour necrosis factor-α amongst Indian buffalo (Bubalus bubalis), Indian cattle (Bos indicus) and other ruminants

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Tumour necrosis factor-α (TNF-α) mRNA from Indian water buffalo (Bubalus bubalis) and Indian cattle (Bos indicus) was reverse transcribed and amplified using reverse transcriptase–polymerase chain reaction (RT-PCR). The nucleotide sequences of cDNAs were determined after cloning into pGEM-T-Easy vector (Promega, Madison, WI) and compared with reported nucleotide sequences of TNF-α cDNA from other species. The nucleotide sequences of TNF-α from Indian cattle revealed significantly high similarities at nucleotide (99.2%) and amino acid (100%) levels with those of cattle (Bos taurus; Zebu). The sequences from buffalo had 98.4% nucleotide and 99.1% amino acid similarities with Indian cattle, indicating functional cross-reactivity. One amino acid deletion at position 63 and one substitution (A→P) at position 64 were observed in buffalo compared with Indian cattle. The amino acid deletion at position 63 was predicted due to differences in pre-mRNA splicing.
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Document Type: Research Article

Affiliations: 1:  National Biotechnology Centre and 2: Division of Biochemistry and Food Sciences, Indian Veterinary Research Institute, Izatnagar, India.

Publication date: 01 August 2004

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