30 P450 sequences that have had their names changed

Last modified July 20, 1999


This is meant to help those who are confused by finding a P450 name changed.  This is 
sometimes necessary when short sequences are named and they do not fall in the same 
location on a tree when full length sequences become known.  It also happens that names 
are sometimes assigned to a new family based on percent identity, but the sequence actually 
belongs to a known family that is quite diverse (i.e. the 4 family).  Then of course there are 
mistakes made.  This list is an attempt to give both names so the nomenclature can be kept 
current.  Old names should be replaced by new names or at least cross-referenced to new 
names. An X after a name indicates it has been discontinued and this usually means it has 
been renamed.  The nomenclature has been used since 1987, so there are a few revisions.  
This has to be expected when more than 1000 names have been assigned.  I have searched 
the nomenclature files for discontinued names.  If you are aware of any other name changes 
that I have not included please send me an email.  DRN

Old Name New Name Comments
CYP2B7PX CYP2B6 alternative splicing product
CYP2B8X CYP2B15 promoter region of CYP2B15
CYP2B14X CYP2B16P reassigned as a pseudogene after CYP2B14P was already taken
CYP2C10X no sequence existence of this sequence is in doubt
CYP2C17X chimera chimera of CYP2C18 and CYP2C19
CYP2C37X CYP2C43 same name assigned to two sequences
CYP4N3X CYP4D8 tree revised
CYP4N4X CYP4E4 tree revised
CYP4R1X CYP4Q7 sequence revised
CYP16A1X CYP13B1 full length sequence shifted location on tree
CYP33D2X CYP33D1 CYP33D2 and CYP33D1 were the same sequence
CYP40A1X CYP27B1 sequence revised
CYP47A1X CYP4AA1 name assigned before tree was made
CYP71D3X no name short fragment named prematurely, probably 71B
CYP72A3X no sequence accidentally assigned a wheat sequence as tobacco
no tobacco 72A sequence is known
CYP72A4X no name chimeric sequence split into multiple 72As
CYP72B2X 714A1 short fragment named prematurely
CYP83B1X CYP83A2 new sequences forced subfamily name revision
CYP89A8X CYP89A2 similar sequences actually the same sequence
CYP91A1X CYP81D1 81 and 91 familes merged, 91 family discontinued
CYP91A2X CYP81F1 81 and 91 familes merged, 91 family discontinued
CYP91A3X CYP81D8 81 and 91 familes merged, 91 family discontinued
CYP91A4X CYP81E1 81 and 91 familes merged, 91 family discontinued
CYP91A5X CYP81E2 81 and 91 familes merged, 91 family discontinued
CYP93D1 CYP712A2 These adjacent sequences had their names accidentally swapped
CYP95A1X CYP72A sequence revised, 95 family discontinued
CYP97A2X CYP97C1 new sequences forced subfamily revision
CYP712A2 CYP93D1 These adjacent sequences had their names accidentally swapped
CYP713A1X CYP71A27 tree revised, 713 family discontinued
CYP713A2X CYP71A28 tree revised, 713 family discontinued