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EC 2.7.99.1 Details
EC number
2.7.99.1
Accepted name
triphosphate—protein phosphotransferase
Reaction
triphosphate + [microsomal-membrane protein] = diphosphate + phospho-[microsomal-membrane protein]
Other name(s)
diphosphate:microsomal-membrane-protein O-phosphotransferase (erroneous), DiPPT (erroneous), pyrophosphate:protein phosphotransferase (erroneous), diphosphate—protein phosphotransferase (erroneous), diphosphate:[microsomal-membrane-protein] O-phosphotransferase (erroneous)
Systematic name
triphosphate:[microsomal-membrane-protein] phosphotransferase
CAS registry number
74092-32-3
Comment
This enzyme was originally thought to use diphosphate as substrate [1] but this has since been disproved [2]. The activity is observed as the second part of a biphasic reaction after depletion of ATP. Tripolyphosphate is a contaminant of [γ-32P]ATP.
History
created 1983 as EC 2.7.1.104, transferred 2005 to EC 2.7.99.1
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