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EC Explorer

EC 2.5.1.127 Details
EC number
2.5.1.127
Accepted name
caldopentamine synthase
Reaction
S-adenosyl 3-(methylsulfanyl)propylamine + norspermine = S-methyl-5′-thioadenosine + caldopentamine
Other name(s)
long-chain polyamine synthase (ambiguous)
Systematic name
S-adenosyl 3-(methylsulfanyl)propylamine:norspermine 3-aminopropyltransferase
Comment
The enzyme, characterized from the thermophilic archaeon Hyperthermus butylicus, can also synthesize norspermine from norspermidine and thermospermine from spermidine (with lower activity). The long-chain polyamines stabilize double-stranded DNA at high temperatures. In contrast to EC 2.5.1.23, sym-norspermidine synthase and EC 2.5.1.126, norspermine synthase, this enzyme shows no activity with propane-1,3-diamine.
History
created 2014
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
1.1.3.1 created 1961, deleted 1984
1.1.3.22 created 1961 as EC 1.2.3.2, transferred 1984 to EC 1.1.3.22, modified 1989, deleted 2004
1.1.3.25 created 1986, deleted 2005
1.1.3.26 created 1989, deleted 2002
1.1.3.31 created 1992, deleted 2003
1.1.3.32 created 1999, deleted 2002
1.1.3.33 created 1999, deleted 2002
1.1.3.34 created 1999, deleted 2002
1.1.3.35 created 1999, deleted 2002
1.1.3.36 created 1999, deleted 2002
1.1.99.15 created 1978, deleted 1980
1.1.99.17 created 1982, deleted 2003