Walls of acid

Wehave examined the effectsof three ring-sizeanalogsof the cyclicb-sheet antimicrobial peptidegramicidinS (GS) on the thermotropic phase behavior and permeability of phos-pholipid model membranes and on the growth of the cell wall-less Gram-positive bacteriaAcholeplasma laidlawiiB. These three analogs have ring sizes of 10 (GS10), 12 (GS12) or 14 (GS14) amino acids, respectively.

10p tumor12 22-04-2013 32 2   Download

Structures of cell wall anionic polymers of the strainStrep-tomycessp. VKMAc-2124, a causative agent of potato scab, which is phylogenetically the closest to plant pathogenic speciesS. setoniiandS. caviscabies, were studied. The strain contains threeanionicglycopolymers, viz., a teichuronicacid with a disaccharide repeatingunitfi6)-a-D-Glcp-(1fi4)-b-D-ManpNAc3NAcA-(1fi,ab-glucosylated polymer of 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid (Kdn), and ab-glucosylated 1,5-poly(ribitol phosphate). ...

6p tumor12 22-04-2013 36 4   Download

A new component of theb-1,6-glucanase (EC 3.2.1.75) multienzymatic complex secreted by Trichoderma harzianumhas been identified and fully characterized. The protein, namely BGN16.3, is the third isozyme display-ing endo-b-1,6-glucanase activity described up to now in T. harzianum CECT 2413. BGN16.3 is an acidicb-1,6-glucanase that is specifically induced by the presence of fungal cell walls in T. harzianumgrowth media.

8p fptmusic 11-04-2013 29 2   Download

The surface charge as well as the electrochemical properties and ligand binding abilities of the Gram-positive cell wall is controlled by the d-alanylation of the lipoteichoic acid. The incorporation of d-Ala into lipoteichoic acid requires the d-alanine:d-alanyl carrier protein ligase (DltA) and the carrier protein (DltC). We have heterologously expressed, purified, and assayed the substrate selectivity of the recombinant proteins DltA with its substrate DltC.

11p awards 06-04-2013 39 5   Download

UDP-d-glucuronic acid and UDP-d-xylose are required for the biosynthesis of glycosaminoglycan in mammals and of cell wall polysaccharides in plants. Given the importance of these glycans to some organisms, the development of a system for production of UDP-d-glucuronic acid and UDP-d-xylose from a common precursor could prove useful for a number of applications.

13p inspiron33 26-03-2013 68 5   Download

Mollicutes are wall-less bacteria and cause various diseases in humans, ani-mals and plants. They have the smallest genomes with low G + C content and lack many genes of DNA, RNA and protein precursor biosynthesis. Nucleoside diphosphate kinase (NDK), a house-keeping enzyme that plays a critical role in the synthesis of nucleic acids precursors, i.e.

8p galaxyss3 19-03-2013 37 4   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Disruption of cell wall fatty acid biosynthesis in Mycobacterium tuberculosis using a graph theoretic approach...

13p toshiba17 28-10-2011 54 3   Download