Any feedback?
Please rate this page
(literature.php)
(0/150)

BRENDA support

Literature summary for 2.4.1.21 extracted from

  • Szydlowski, N.; Ragel, P.; Hennen-Bierwagen, T.A.; Planchot, V.; Myers, A.M.; Merida, A.; dHulst, C.; Wattebled, F.
    Integrated functions among multiple starch synthases determine both amylopectin chain length and branch linkage location in Arabidopsis leaf starch (2011), J. Exp. Bot., 62, 4547-4559.
    View publication on PubMed

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Arabidopsis thaliana
-

General Information

General Information Comment Organism
physiological function construction of double mutant isoforms ss1- ss2- or ss1- ss3- lines using confirmed null mutations. Double mutant plants develop similarly to the wild type, although they accumulate less leaf starch in both short-day and long-day diurnal cycles. Lines containing only SS2 and SS4, or SS3 and SS4, are able to produce substantial amounts of starch granules. In both double mutants the residual starch is structurally modified including higher ratios of amylose to amylopectin, altered glucan chain length distribution within amylopectin, abnormal granule morphology, and altered placement of alpha(1-6) branch linkages relative to the reducing end of each linear chain. Starch Ssynthase activity affects not only chain elongation but also the net result of branch placement accomplished by the balanced activities of starch branching enzymes and starch debranching enzymes. Isoform SS3 partially overlaps in function with isoform SS1 for the generation of short glucan chains within amylopectin Arabidopsis thaliana