The first human α-spectrin structural domain begins with serine

Denise M. Lusitani, Nasser Qtaishat, Cynthia C. LaBrake, Richard N. Yu, James Davis, Mark Kelley, Leslie W M Fung

Research output: Contribution to journalArticle

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Abstract

The 106-amino acid sequence motifs of spectrin have been suggested to fold into stable structural domains, consisting mostly of coiled coils of triple helices. With the advent of molecular biology and biophysical techniques, structural studies of these spectrin 106-amino acid structural domains became approachable. However, one of the difficulties in such an approach is determination of the correct phasing of the structural domains, which may or may not coincide with the phasing of the sequence motifs. Proper identification of the domain phasing is vital to the construction of stable spectrin domains for molecular studies. A previously published phasing shift for Drosophila α-spectrin indicated a downstream phase-shift of 26 amino acids for the structural domain (Winograd, E., Hume, D., and Branton, D. (1991) Proc. Natl. Acad. Sci. U. S. A. 88, 10788-10791). Using this phase- shift, we prepared a recombinant spectrin peptide with the sequence from residue 49 to residue 155 of human erythrocyte α-spectrin and found this peptide to be unstable relative to other peptides that we prepared. Using several other recombinant α-spectrin peptides and following the protease digestion approach, we digested spectrin peptides with elastase and chymotrypsin and analyzed the amino acid sequence of the digestive products. We provide the first experimental evidence in identifying the first amino acid residues of the first spectrin domain in human erythrocyte α-spectrin as residue 52 (Ser).

Original languageEnglish
Pages (from-to)25955-25958
Number of pages4
JournalJournal of Biological Chemistry
Volume269
Issue number42
StatePublished - Oct 21 1994

Fingerprint

Spectrin
Serine
Amino Acids
Peptides
Phase shift
Amino Acid Sequence
Erythrocytes
Amino Acid Motifs
Molecular biology
Pancreatic Elastase
Chymotrypsin
Drosophila
Molecular Biology
Digestion
Peptide Hydrolases

ASJC Scopus subject areas

  • Biochemistry

Cite this

Lusitani, D. M., Qtaishat, N., LaBrake, C. C., Yu, R. N., Davis, J., Kelley, M., & Fung, L. W. M. (1994). The first human α-spectrin structural domain begins with serine. Journal of Biological Chemistry, 269(42), 25955-25958.

The first human α-spectrin structural domain begins with serine. / Lusitani, Denise M.; Qtaishat, Nasser; LaBrake, Cynthia C.; Yu, Richard N.; Davis, James; Kelley, Mark; Fung, Leslie W M.

In: Journal of Biological Chemistry, Vol. 269, No. 42, 21.10.1994, p. 25955-25958.

Research output: Contribution to journalArticle

Lusitani, DM, Qtaishat, N, LaBrake, CC, Yu, RN, Davis, J, Kelley, M & Fung, LWM 1994, 'The first human α-spectrin structural domain begins with serine', Journal of Biological Chemistry, vol. 269, no. 42, pp. 25955-25958.
Lusitani DM, Qtaishat N, LaBrake CC, Yu RN, Davis J, Kelley M et al. The first human α-spectrin structural domain begins with serine. Journal of Biological Chemistry. 1994 Oct 21;269(42):25955-25958.
Lusitani, Denise M. ; Qtaishat, Nasser ; LaBrake, Cynthia C. ; Yu, Richard N. ; Davis, James ; Kelley, Mark ; Fung, Leslie W M. / The first human α-spectrin structural domain begins with serine. In: Journal of Biological Chemistry. 1994 ; Vol. 269, No. 42. pp. 25955-25958.
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