The yeast ribosomal protein S7 and its genes.
Ribosomal protein S7 of Saccharomyces cerevisiae is encoded by two genes RPS7A and RPS7B. The sequence of each copy was determined; their coding regions differ in only 14 nucleotides, none of which leads to changes in the amino acid sequence. The predicted protein consists of 261 amino acids, making it the largest protein of the 40 S ribosomal subunit. It is highly basic near the NH2 terminus, as are most ribosomal proteins. Protein S7 is homologous to both human and rat ribosomal protein S4. RPS7A and RPS7B contain introns of 257 and 269 nucleotides, respectively, located 11 nucleotides beyond the initiator AUG. The splicing of the introns is efficient. Either RPS7A or RPS7B will support growth. However, deletion of both genes is lethal. RPS7A maps distal to CDC11 on chromosome X, and RPS7B maps distal to CUP1 on chromosome VIII.[1]References
- The yeast ribosomal protein S7 and its genes. Synetos, D., Dabeva, M.D., Warner, J.R. J. Biol. Chem. (1992) [Pubmed]
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