Isolation by a new method and sequence analysis of chromosomal HMG-17 protein from porcine thymus (Journal article)

Boumba, V. A./ Tsolas, O./ Choli-Papadopoulou, D./ Seferiadis, K.

Nonhistone chromosomal protein HMG-17 from porcine thymus has been isolated by extraction in boiling water, gel filtration and HPLC, and its complete primary structure (89 residues) has been determined. Peptides derived from enzymatic hydrolysis with trypsin, Staphylococcus aureus V-8 protease, Arg-C, and Glu-C proteinases were purified by HPLC and sequenced by the 4-(N,N-dimethylamino)azobenzene-4'-isothiocyanate/phenylisothiocyanate double coupling method. Porcine HMG-17 has a molecular mass of 9248 Da and a pI > 9.8. No glycosylation or methylation has been detected. The primary structure of this protein is almost identical to the sequence deduced from a cDNA clone derived from a human cell line. Porcine thymus HMG-17 differs from the human protein by only a single conservative substitution at position 64 (aspartic acid instead of glutamic acid). As in other HMG-17 proteins, the sequence is characterized by a lysine- and proline-rich central region, which has been implicated in DNA binding.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής
Keywords: Amino Acid Sequence,Animals,Chromatography, Gel,Chromatography, High Pressure Liquid,Glycosylation,High Mobility Group Proteins/*chemistry/*isolation & purification/metabolism,Hot Temperature,Molecular Sequence Data,Peptide Fragments/chemistry/isolation & purification/metabolism,Protein Processing, Post-Translational,Protein Structure, Secondary,*Sequence Analysis,Serine Endopeptidases/metabolism,Swine,Thymus Gland/*chemistry
ISSN: 0003-9861
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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