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EC 1.1.1.307 Details
EC number
1.1.1.307
Accepted name
D-xylose reductase [NAD(P)H]
Reaction
xylitol + NAD(P)+ = D-xylose + NAD(P)H + H+
Other name(s)
XylR, msXR, dsXR, dual specific xylose reductase, NAD(P)H-dependent xylose reductase, xylose reductase (ambiguous), D-xylose reductase (ambiguous)
Systematic name
xylitol:NAD(P)+ oxidoreductase
Comment
Xylose reductases catalyse the reduction of xylose to xylitol, the initial reaction in the fungal D-xylose degradation pathway. Most of the enzymes exhibit a strict requirement for NADPH [cf. EC 1.1.1.431, D-xylose reductase (NADPH)]. However, a few D-xylose reductases, such as those from Neurospora crassa [5], Yamadazyma tenuis [2,3], Scheffersomyces stipitis [1], and the thermophilic fungus Chaetomium thermophilum [4,7], have dual coenzyme specificity, though they still prefer NADPH to NADH. Very rarely the enzyme prefers NADH [cf. EC 1.1.1.430, D-xylose reductase (NADH)].
History
created 2010, modified 2022
EC Tree
1.1.1.68 created 1965, deleted 1978 [transferred to EC 1.1.99.15, deleted 1980]
1.1.1.70 created 1965, deleted 1978
1.1.1.74 created 1972, deleted 1976
1.1.1.89 created 1972, deleted 1976
1.1.1.109 created 1972, deleted 1976
1.1.1.139 created 1972, deleted 1978
1.1.1.155 created 1976, deleted 2004
1.1.1.171 created 1978, deleted 1984
1.1.1.180 created 1983, deleted 1984
1.1.1.182 created 1983, deleted 1990
1.1.1.204 created 1972 as EC 1.2.1.37, transferred 1984 to EC 1.1.1.204, modified 1989, deleted 2004
1.1.1.242 created 1992, deleted 2001
1.1.1.249 provisional version created 1999, deleted 1999 (reinstated 2001 as EC 2.5.1.46)
1.1.1.253 created 1999, deleted 2003