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Strategy for the mass spectrometric verification and correction of the primary structures of proteins deduced from their DNA sequences.
Fast atom bombardment mass spectrometry has been used to confirm and correct regions from the amino acid sequences of three large proteins, glutaminyl- and glycyl-tRNA synthetase from Escherichia coli and methionyl-tRNA synthetase from yeast, whose primary structures had been deduced from the base sequences of their corresponding genes. The strategy is based on a comparison of the molecular weights of the tryptic peptides predicted from all three reading frames of the gene sequences with those determined mass spectrometrically. The experimental molecular weights either match or differ and can be used to assess the correctness of the base sequences, identify errors that lead to frame shifts, premature stop codons, incorrect amino acids, etc., or identify the presence of posttranslational modifications. This method is very fast and requires little material (5-20 nmol).
PMID: 6371805 [PubMed - indexed for MEDLINE]
PMCID: PMC345415
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Cited by 4 PubMed Central articles
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Microwave-enhanced enzyme reaction for protein mapping by mass spectrometry: a new approach to protein digestion in minutes.
Pramanik BN, Mirza UA, Ing YH, Liu YH, Bartner PL, Weber PC, Bose AK.
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[Protein Sci. 2002]
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The complete sequence of human lens gamma s-crystallin.
Smith JB, Yang Z, Lin P, Zaidi Z, Abbasi A, Russell P.
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[Biochem J. 1995]
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Two tissue-specific isozymes of creatine kinase have closely matched amino acid sequences.
Pickering L, Pang H, Biemann K, Munro H, Schimmel P.
Proc Natl Acad Sci U S A. 1985 Apr; 82(8):2310-4.
[Proc Natl Acad Sci U S A. 1985]
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