Molecular structure of three mutations at the maize surgary1 locus and their allele-specific phenotypic effects

From: Plant Physiology | Date: March 1, 2001| Author: | Copyright information

Starch production in all plants examined is altered by mutations of isoamylase-type starch-debranching enzymes (DBE), although how these proteins affect glucan polymer assembly is not understood. Various allelic mutations in the maize (Zea mays) gene sugary) (su1), which codes for an isoamylase-type DBE, condition distinct kernel phenotypes. This study characterized the recessive mutations su1-Ref, su1-R4582::Mul, and su1-st, regarding their molecular basis, chemical phenotypes, and effects on starch metabolizing enzymes. The su1-Ref allele results in two specific amino acid substitutions ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Starch Biosynthetic Enzymes from Developing Maize Endosperm Associate in Multisubunit Complexes1[OA]
; ...metabolic pathway. Such genetic evidence indicates functional relationships...glycoside bonds referred to as branch linkages. Amylopectin and glycogen...however, with regard to branch frequency and the relative...1[arrow right]6) bonds. Branch linkages of ...
Felon DNA database gets Senate OK.(News)
; ...requiring all felons submit genetic evidence to a state database. Specifically...lawmakers pointed out that genetic evidence appears to have helped break...shows what police can do with genetic evidence and points to the need for...
Calif. prosecutor, an expert on DNA evidence, to take spotlight in Simpson evidence hearing this week. (Originated from Knight-Ridder Newspapers)
; ...will argue that jurors should hear genetic evidence linking Simpson to the killings, Harmon...during the past six years: to get genetic evidence as widely accepted in California as...first DNA-related cases, and he used genetic evidence to charge a suspect in a decade-old...
Courts Face the Exciting and the Inevitable: DNA in Civil Trials
; ...utilize the type of information that genetic evidence can provide. The civil-court system...the discovery or admissibility of genetic evidence in tort cases. This Note argues that...although there are a number of concerns, genetic evidence should be discoverable in civil cases...
New law lets state set up DNA files on all prisoners.(News)
; ...killings in Palatine. Nine years later, genetic evidence found on that dinner matched with...person going to prison to provide genetic evidence - usually taken through a mouth swab...perpetrators already are required to provide genetic evidence, this carries the potential to ...
What the scientists say
; ...my opinion there is no irrefutable genetic evidence to link Mr Dougherty with any of the...typed in this case. There is reliable genetic evidence to implicate a second person, not...pyjamas. By contrast, there is no genetic evidence of any significance which links him...
Fairfax Brings Rape Charges Based on Genetic Evidence
; ...the first criminal case involving genetic evidence in Fairfax, police have charged Jack...criminal conviction in Virginia based on genetic evidence was obtained Friday when an Arlington...states in the country have allowed genetic evidence in trials. Tests analyze the DNA...
Mutations Affecting Starch Synthase III in Arabidopsis Alter Leaf Starch Structure and Increase the Rate of Starch Synthesis1
; ...contains α-(l[arrow right]6) branch linkages at a frequency of approximately 5...catalyzed by the starch synthases (SSs). Branch linkages are introduced by branching enzymes...Starch-debranching enzymes (DBEs) hydrolyze branch linkages and are thought to be involved in...
Purification and molecular genetic characterization of ZPU1, a pullulanase-type starch-debranching enzyme from maize
; ...positioning of a(1-6) glycosidic bonds, i.e. branch linkages, is a critical aspect of the three-dimension...amylopectin (Gallant et al., 1997). Branch linkages are introduced by the actions of starch...Isoamylasetype" DBEs cleave alpha(1-->6) branch linkages in amylopectin and ...
Man Pleads Guilty to Rape in Fairfax After DNA Evidence Linked to Case
; ...and robbery at the first trial in Fairfax County at which genetic evidence was permitted linking a suspect with a crime. Jack W. Johnson...said. The first criminal conviction in Virginia based on genetic evidence was obtained last month in Arlington. DNA testing also...