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

BRENDA support

EC Explorer

EC 2.4.1.1 Details
EC number
2.4.1.1
Accepted name
glycogen phosphorylase
Reaction
[(1→4)-α-D-glucosyl]n + phosphate = [(1→4)-α-D-glucosyl]n-1 + α-D-glucose 1-phosphate
Other name(s)
muscle phosphorylase a and b, amylophosphorylase, polyphosphorylase, amylopectin phosphorylase, glucan phosphorylase, α-glucan phosphorylase, 1,4-α-glucan phosphorylase, glucosan phosphorylase, granulose phosphorylase, maltodextrin phosphorylase, muscle phosphorylase, myophosphorylase, potato phosphorylase, starch phosphorylase, 1,4-α-D-glucan:phosphate α-D-glucosyltransferase, phosphorylase (ambiguous)
Systematic name
(1→4)-α-D-glucan:phosphate α-D-glucosyltransferase
CAS registry number
9035-74-9
Comment
This entry covers several enzymes from different sources that act in vivo on different forms of (1→4)-α-D-glucans. Some of these enzymes catalyse the first step in the degradation of large branched glycan polymers - the phosphorolytic cleavage of α-1,4-glucosidic bonds from the non-reducing ends of linear poly(1→4)-α-D-glucosyl chains within the polymers. The enzyme stops when it reaches the fourth residue away from an α-1,6 branching point, leaving a highly branched core known as a limit dextrin. The accepted name of the enzyme should be modified for each specific instance by substituting "glycogen" with the name of the natural substrate, e.g. maltodextrin phosphorylase, starch phosphorylase, etc.
History
created 1961, modified 2013
EC Tree
2.4.1.3 created 1961, deleted 1972
2.4.1.6 created 1961, deleted 1972
2.4.1.42 created 1972, deleted 1984
2.4.1.51 created 1972, deleted 1984
2.4.1.55 created 1972, deleted 1982
2.4.1.59 created 1972, deleted 1984
2.4.1.61 created 1972, deleted 1984
2.4.1.72 created 1972, deleted 1976
2.4.1.75 created 1976, deleted 2005
2.4.1.76 created 1976, deleted 1984
2.4.1.77 created 1976, deleted 1984
2.4.1.84 created 1976, deleted 1984
2.4.1.89 created 1976, deleted 1984
2.4.1.93 created 1976, deleted 2004
2.4.1.98 created 1980, deleted 1984
2.4.1.107 created 1983, deleted 1984
2.4.1.108 created 1983, deleted 1984
2.4.1.124 created 1984, deleted 2002
2.4.1.151 created 1984, deleted 2002
2.4.1.169 created 1989, deleted 2003
2.4.1.200 created 1992, deleted 2004
2.4.1.204 created 1992, deleted 2003
2.4.1.233 created 2004, deleted 2005