Shielding of tryptophan residues of avidin by the binding of biotin
β Scribed by Kurzban, Gary P.; Gitlin, Gerry; Bayer, Edward A.; Wilchek, Meir; Horowitz, Paul M.
- Book ID
- 126013978
- Publisher
- American Chemical Society
- Year
- 1989
- Tongue
- English
- Weight
- 765 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0006-2960
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The biotin-1,4-diaminobutane (Bio-Put), biotin-tryptophan (Bio-Trp) and biotin-3-methylindole (Bio-Sct) systems were investigated by means of Raman spectroscopy. The interaction with Put renders the polar resonance forms of Bio more stabilized. One group of Put is protonated by the COOH group of Bio
The binding of avidin (Avi) with biotin (Bio) and some Bio analogues (biotin methyl ester, desthiobiotin, 2ΒΊiminobiotin and diaminobiotin) was studied by means of Fourier transform Raman spectroscopy. The di β erence in affinity between the protein and these ligands provides a detailed picture of the