Some problems of cluster dynamics of biological macromolecules

Raman spectra of crystalline subglobular proteins exhibit peaks in the low-frequency spectral range (tens of wavenumbers). These peaks can be related to resonance oscillations of subglobules and possibly play an important role in the catalytic act. The low-frequency spectral features were not observed in aqueous solutions. According to the hydrodynamics, the corresponding oscillations must be overdamped. The results obtained by the methods of molecular dynamics show that the Q-factor of subglobular oscillations can be larger than 10, which stimulated further experimental studies of solutions of proteins.

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“…In the case of one globule, we can use expression (2). If w-0 this formula is reduced to Stokes formula provided that Re<<l: …”

mentioning

confidence: 98%

<title>Are the subglobular oscillations of protein molecule in water overdamped?</title>

2002

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Acoustic Solitons

Lupichev¹,

Savin²,

Kadantsev³

2014

Synergetics of Molecular Systems

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Nonlinear dynamics of zigzag molecular chains

Savin¹,

Manevich

Christiansen

et al. 1999

Phys.-Usp.

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Nonlinear, collective, soliton type excitations in zigzag molecular chains are analyzed. It is shown that the nonlinear dynamics of a chain dramatically changes in passing from the one-dimensional linear chain to the more realistic planar zigzag model Ð due, in particular, to the geometry-dependent anharmonism that comes into the picture. The existence or otherwise of solitons is determined in this case by the interplay between the geometrical anharmonism and the physical anharmonism of the interstitial interaction, of opposite signs. The nonlinear dynamic analysis of the three most typical zigzag models (two-dimensional alpha-spiral, polyethylene transzigzag backbone, and the zigzag chain of hydrogen bonds) shows that the zigzag structure essentially limits the soliton dynamics to finite, relatively narrow, supersonic soliton velocity intervals and may also result in that several acoustic soliton types (such as extension and compression varieties) develop simultaneously in the chain. Accordingly, the inclusion of chain geometry is necessary if physical phenomena are to be described in terms of solitary waves.

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Some problems of cluster dynamics of biological macromolecules

Cited by 4 publications

References 17 publications

<title>Are the subglobular oscillations of protein molecule in water overdamped?</title>

<title>Are the subglobular oscillations of protein molecule in water overdamped?</title>

Acoustic Solitons

Nonlinear dynamics of zigzag molecular chains

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