Alexander Konarev's Pages
HOME RESEARCHES  CV  PUBLICATIONS JOURNEYS

RESEARCHES

I study plant proteins which inhibit hydrolytic  enzymes of various organisms:

Inhibitors are of interest as:

The inhibitors are well studied in various plants, but, generally, molecular structures of single inhibitors are studied much more then their natural variability in plant taxa.

The simple and sensitive methods for detection of  inhibitors of alpha-amylases, serine and cysteine proteinases and lectins among plant proteins separated by electrophoresis,  isoelectric focusing or thin layer gel-filtration were elaborated (Konarev, 1985, 1986; Konarev et al., 1991, 2000, 2002). These methods were used in study of the polymorphism and natural variability of main inhibitor systems in wild and cultivated species of wheat and related cereals, rice, potato,  Vigna and Phaseolus, sunflower, various Compositae, other Asteridae, Gymnospermae and for identification of novel inhibitor types. Small (1.5 kDa) cyclic trypsin inhibitor from sunflower seeds can be one of the examples of such inhibitors.

Besides, I like to travel. I collect wild plants or simply vizit exotic places...

EXAMPLES OF RESEARCHES



Polymorphism of insect alpha-amylase inhibitors in diploid wheats collected in Armenia and Azerbaidjan.
A, isoelectric focusing.
B, thin layer gel filtration. Inhibitors of Tenebrio molitor amylase were detected with use of PAAG/starch/amylase replicas



Variability of trypsin inhibitors in Vigna and Phaseolus species.
Isoelectric focusing of seed proteins followed by detection of inhibitors with use of gelatin replicas method.



The polymorphism of chymotrypsin/subtilisin inhibitors in several bread wheat varieties. Endosperm proteins were extracted with water and separated by isoelectric focusing in PAG. Protein bands were transferred from gel to the gelatine replica by diffusion and the latter was developed by chymotrypsin.




More than 500 species of Compositae and other Asteridae were screened for proteinase inhibitors. Cyclic low-molecular trypsin inhibitor consisting only of 14 amino acid residues was found only in seeds of Helianthus and Tithonia species. It appeared to be the smallest and most potent trypsin inhibitor ever found in plants.




Presentation of methods for detection of insect alpha-amylase and proteinase inhibitors among Vigna proteins in Laboratory of Plant Evolutionary Dynamics in NIAR, Head Dr. Duncan.A.Vaughan (right), Tsukuba, Japan.



KEY WORDS

insect amylase inhibitors, proteinase inhibitors, trypsin inhibitors,  chymotrypsin inhibitors,  subtilisin inhibitors, cysteine proteinase inhibitors, papain inhibitors,  ficin inhibitors, lectins,  methods for detection of inhibitors,   plant  diversity, plant evolution,  plant systematics, plant resistance, cereals, legumes, potato, sunflower, Compositae, Asteridae, Gymnospermae, Triticum, Aegilops, Secale, Hordeum, Vigna,  Phaseolus,  Oryzae, Helianthus, Carthamus, Cosmos, Zinnia, Centaurea, Veronica, Anthriscus


Interesting links on plant biochemistry, inhibitors etc.

http://delphi.phys.univ-tours.fr/Prolysis/  - Protease inhibitors

http://www.biochemist.com/home.htm - Site for biochemists


E-mail to Alexander Konarev

home researches  cv  publications journeys

TOP

Используются технологии uCoz