Role of large hydrophobic residues in proteins.

Bioinformation

Department of Computer Application, Periyar Maniammai University, Thanjavur - 613403, Tamil Nadu, India.

Published: June 2009

AI Article Synopsis

  • Large Hydrophobic Residues (LHR) like phenylalanine, isoleucine, leucine, methionine, and valine are crucial for protein structure and function, and this study analyzes their distribution across proteins in 15 different species.
  • The research finds that proteins generally maintain around 27% LHR throughout their sequences, with a notable accumulation of these residues in active sites.
  • A specific analysis indicates that this 27% frequency of LHR is most pronounced in segments of 45 amino acids, while the influenza virus and P. falciparum show a more random distribution of LHR compared to other organisms.

Article Abstract

Large Hydrophobic Residues (LHR) such as phenylalanine, isoleucine, leucine, methionine and valine play an important role in protein structure and activity. We describe the role of LHR in complete set of protein sequences in 15 different species. That is the distribution of LHR in different proteins of different species is reported. It is observed that the proteins prefer to have 27% of large hydrophobic residues in total and all along the sequence. It is also observed that proteins accumulate more LHR in its active sites. A window analysis on these protein sequences shows that the 27% of LHR is more frequent at window length of 45 amino acids. The influenza virus and P. falciparum show a random distribution of LHR in its proteins compared to other model organisms.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2732037PMC
http://dx.doi.org/10.6026/97320630003409DOI Listing

Publication Analysis

Top Keywords

large hydrophobic
12
hydrophobic residues
12
protein sequences
8
distribution lhr
8
lhr proteins
8
observed proteins
8
lhr
6
proteins
5
role large
4
residues proteins
4

Similar Publications

Magnaporthe oryzae is the causal agent of rice blast, one of the most serious diseases affecting rice cultivation around the world. During plant infection, M. oryzae forms a specialised infection structure called an appressorium.

View Article and Find Full Text PDF

Surface Hydrophilic Modification of Polypropylene by Nanosecond Pulsed Ar/O Dielectric Barrier Discharge.

Materials (Basel)

December 2024

College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China.

Polypropylene (PP) membranes have found diverse applications, such as in wastewater treatment, lithium-ion batteries, and pharmaceuticals, due to their low cost, excellent mechanical properties, thermal stability, and chemical resistance. However, the intrinsic hydrophobicity of PP materials leads to membrane fouling and filtration flux reduction, which greatly hinders the applications of PP membranes. Dielectric barrier discharge (DBD) is an effective technique for surface modification of materials because it generates a large area of low-temperature plasma at atmospheric pressure.

View Article and Find Full Text PDF

The physicochemical properties of emulsions based on poloxamers (triblock copolymers of a hydrophobic polyoxypropylene chain and two hydrophilic polyoxyethylene chains) depend on the composition and preparation method. This study examined the impact of poloxamer P188 concentration, autoclaving mode, heating, and salt presence on the viscosity, particle size distribution, and morphology of particles using viscometric analysis, dynamic light scattering (DLS), and atomic force microscopy (AFM). It was shown that sample preparation affects the particle size and morphology but not the chemical composition of P188.

View Article and Find Full Text PDF

Elucidating the effect of chitosan microgel characteristics on the large amplitude oscillatory shear (LAOS) behavior of their stabilized high internal phase emulsions using the sequence of physical processes (SPP) approach and comparison with mayonnaise.

Int J Biol Macromol

January 2025

Glyn O. Phillips Hydrocolloid Research Centre, National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Industrial Microbiology in Hubei, Key Laboratory of Fermentation Engineering (Ministry of Education), Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China; Food Hydrocolloid International Science and Technology Cooperation Base of Hubei Province, Wuhan 430068, China. Electronic address:

Chitosan microgels (h-CSMs) were prepared by cross-linking hydrophobically modified chitosan with sodium phytate (SP). Emulsions stabilized by h-CSMs with different inter-phase fraction, microgel concentration and cross-linking density were studied of their microstructural and rheological properties. In particular, the large amplitude oscillatory shear (LAOS) of the high internal phase emulsions (HIPEs) stabilized by h-CSMs were systematically analyzed using the Fourier transform with Chebyshev polynomials (FTC) and sequence of physical processes (SPP) methods, to explore their nonlinear rheological properties.

View Article and Find Full Text PDF

Laccases that oxidize low-density polyethylene (LDPE) represent a promising strategy for bioremediation purposes. To rationalize or optimize their PE-oxidative activity, two fundamental factors must be considered: the enzyme's redox potential and its binding affinity/mode towards LDPE. Indeed, a stable laccase-PE complex may facilitate a thermodynamically unfavorable electron transfer, even without redox mediators.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!