Protein
Light-independent protochlorophyllide reductase subunit B
Organism
Methylobacterium radiotolerans (strain ATCC 27329 / DSM 1819 / JCM 2831 / NBRC 15690 / NCIMB 10815 / 0-1)
Function
Component of the dark-operative protochlorophyllide reductase (DPOR) that uses Mg-ATP and reduced ferredoxin to reduce ring D of protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide). This reaction is light-independent. The NB-protein (BchN-BchB) is the catalytic component of the complex.
Similarity
Belongs to the ChlB/BchB/BchZ family.
Sequence
MQLTLWTYEGPPHIGAMRVATAMSGLHYVLHAPQGDTYADLLFTMIERRDARPPVTYTTFRAQDLGRDTAELFKEAVAAAHARFRPQAMIVGASCTAELIQDDPGGLAKALDLPIPVIPLELPAYQKKENWGASETFYRLVRALAGAPAPRPAREPGRRPLCNILGPTALGFRHRDDLIEIRRLLDTLGIAVNVVAPLGATPADLGRLRDADFNVVLYPETARSAADYLKKAFGQPFTQTIPIGVGGTRRFVEEVAGLAGIDPAPVLDGSGSRLPWYSRSVDSTYLTGKRVFMFGDATHAIGIARVAAKELGFTLVGLGTYGREFAREVRAEAAAHGIEALVTDDYLDVEAAIRAAAPELVLGTQMERHVAKRLGIPCAVISAPVHVQDFPARYAPQMGFEGANVLFDTLVHPLMMGLEEHLLGMFREDPEFHDGVGPSHLGGKSFGTPADEAFEAAERAPADTPPTPAPVPILLERPAATAWSPEAEKELKKIPFFVRGKARTNTETFARERHLPLITLETLYDAKAHYGR