Amide I band and photoinduced disassembly of a peptide hydrogel
نویسندگان
چکیده
منابع مشابه
Empirical modeling of the peptide amide I band IR intensity in water solution
An empirical correction to amide group vacuum force fields is proposed in order to account for the influence of the aqueous environment on the CvO stretching vibration ~amide I!. The dependence of the vibrational absorption spectral intensities on the geometry is studied with density functional theory methods at the BPW91/6-31G** level for N-methyl acetamide interacting with a variety of of wat...
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The amide I and II bands in myoglobin show a heterogeneous temperature dependence, with bands at 6.17 and 6.43 microm which are more intense at low temperatures. The amide I band temperature dependence is on the long wavelength edge of the band, while the short wavelength side has almost no temperature dependence. We compare concepts of anharmonic solid-state crystal physics and chemical physic...
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An effective exciton Hamiltonian for all amide bands is used to calculate the linear absorption and photon echo spectra of a 17 residue helical peptide (YKKKH17). The cross peak bandshapes are sensitive to the inter-band couplings. Fluctuations of the local amide frequencies of the all amide fundamental and their overtone and combination states are calculated using the multipole electric field ...
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A new biological active hexapeptide of C-terminal of nocistatin, contains Glu-Gln-Lys-Gln-Leu-Gln sequence was synthesized according to solid phase peptide synthesis on the surface of 2-chloro tritylchloride resin and using fmoc-protected amino acids in the presence of TBTU (O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyl uranium tetrafluoroborate) as a coupling reagent. Then, amidation of the C-te...
متن کاملThe (13)C amide I band is still sensitive to conformation change when the regular amide I band cannot be distinguished at the typical position in H2O.
The attenuated total reflection technique was utilized to obtain FTIR spectra of (13)C-labeled peptides with a sequence of (AAAAK)4AAAAY in H2O. The regular amide I band was not at the typical position as reported in globular proteins, whereas the (13)C amide I band was still sensitive to conformation change.
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ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 2013
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2013.06.055