beta-Amylase - Chemistry
Research News and Information

Monday, November 23, 2009

The carbohydrate-binding module family 20--diversity, structure, and function.

11 Aug 2009 Starch-active enzymes often possess starch-binding domains (SBDs) mediating attachment to starch granules and other high molecular weight substrates. SBDs are divided into nine carbohydrate-binding module (CBM) families, and CBM20 is the ... Read more...

Catalytically-inactive beta-amylase BAM4 required for starch breakdown in Arabidopsis leaves is a starch-binding-protein.

3 Aug 2009 Of the four chloroplast beta-amylase (BAM) proteins identified in Arabidopsis, BAM3 and BAM4 were previously shown to play the major roles in leaf starch breakdown, although BAM4 apparently lacks key active site residues and beta-amylase activity. ... Read more...

Network analysis of biochemical logic for noise reduction and stability: a system of three coupled enzymatic and gates.

14 Apr 2009 We develop an approach aimed at optimizing the parameters of a network of biochemical logic gates for reduction of the "analog" noise buildup. Experiments for three coupled enzymatic AND gates are reported, illustrating our procedure. Specifically, ... Read more...

Latest indexed articles for 'beta-Amylase - Chemistry'

These are the very latest articles for this heading:

• The carbohydrate-binding module family 20--diversity, structure, and function. 11 Aug 2009
• Catalytically-inactive beta-amylase BAM4 required for starch breakdown in Arabidopsis leaves is a starch-binding-protein. 3 Aug 2009
• Network analysis of biochemical logic for noise reduction and stability: a system of three coupled enzymatic and gates. 14 Apr 2009
• Beta-AMYLASE4, a noncatalytic protein required for starch breakdown, acts upstream of three active beta-amylases in Arabidopsis chloroplasts. 2 Apr 2008
• A chemical approach for detecting sulfenic acid-modified proteins in living cells. 12 Mar 2008
• Continuous extraction of alpha- and beta-amylases from Zea mays malt in a PEG4000/CaCl2 ATPS. 6 Sep 2007
• Analytical method for detection of beta-amylase isozymes in dehydrated cucumber cotyledons by using two-dimensional polyacrylamide gel electrophoresis. 23 Mar 2007
• Improved methods for the structural analysis of the amylose-rich fraction from rice flour. 27 Feb 2006
• Relationship between malt qualities and beta-amylase activity and protein content as affected by timing of nitrogen fertilizer application. 30 Dec 2005
• RNA interference of Arabidopsis beta-amylase8 prevents maltose accumulation upon cold shock and increases sensitivity of PSII photochemical efficiency to freezing stress. 29 Nov 2005
• Structural analysis of threonine 342 mutants of soybean beta-amylase: role of a conformational change of the inner loop in the catalytic mechanism. 3 Apr 2005
• Fishing of beta-amylase with a SAM of alpha-cyclodextrin-poly- (ethylene glycol) conjugate. 13 Nov 2004
• Engineering of the pH optimum of Bacillus cereus beta-amylase: conversion of the pH optimum from a bacterial type to a higher-plant type. 3 Oct 2004
• The roles of Glu186 and Glu380 in the catalytic reaction of soybean beta-amylase. 16 Jun 2004
• Two additional carbohydrate-binding sites of beta-amylase from Bacillus cereus var. mycoides are involved in hydrolysis and raw starch-binding. 28 Feb 2004
• Beta-amylases from various fungal strains. A review. 30 Dec 2003
• Structural and enzymatic analysis of soybean beta-amylase mutants with increased pH optimum. 22 Nov 2003
• Change in the crystal packing of soybean beta-amylase mutants substituted at a few surface amino acid residues. 30 Oct 2003
• Beta-amylase in germinating millet seeds. 30 Oct 2003
• Crystal structure of a catalytic site mutant of beta-amylase from Bacillus cereus var. mycoides cocrystallized with maltopentaose. 18 May 2003

See a longer list of these articles.

Technical information about 'beta-Amylase'

Definition: An enzyme that catalyzes the hydrolysis of 1,4-alpha-glycosidic linkages in starch, glycogen, and related polysaccharides and oligosaccharides so as to remove successive beta-maltose units from the non-reducing ends of the chains. EC 3.2.1.2.

Chemical name: 1,4-alpha-D-Glucan maltohydrolase

Registry Number: EC 3.2.1.2

Descriptor UI: D001614

Alternative terms: beta-Amylase; beta Amylase;

Allowable Qualifiers: administration & dosage; adverse effects; analysis; antagonists & inhibitors; biosynthesis; blood; cerebrospinal fluid; chemical synthesis; classification; deficiency; diagnostic use; drug effects; economics; genetics; history; immunology; isolation & purification; metabolism; pharmacokinetics; pharmacology; physiology; poisoning; radiation effects; secretion; standards; supply & distribution; therapeutic use; toxicity; ultrastructure; urine; chemistry; contraindications;

Tree Number: D08.811.277.450.066.100;

History Note: 91(78); was see under AMYLASES 1978-90