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 (ChlN-ChlB) is the catalytic component of the complex.

Belongs to the ChlB/BchB/BchZ family.

530 amino acids

MELTLWTYEGPPHVGAMRIAASMHGVHYVLHAPQGDTYADLLFTMIERRGQRPPVTYTTFQARDLGGDTAELVKRHVQEAADRFQPDALLVGESCTAELIQDQPGALAQGMGLPMPVVTLELPAYSKKENWGASETFYQLMRGLLKQSVPPQPSHDVQAWKHEGRRPRVNLLGPSLLGFRCRDDVLEVQRLLSLHGIDVGVVAPLGAGVEDILRLPQADLNVCLYPEVAESSCSWLERNFGIPFSKTVPIGMGATHDFLVEVHALLGMTPPEAAEGYQRSRMPWYSESVDSTYLTGKRVFIFGDGTHAIAAARICSEELGFTVVGLGSYSREMARPVRAAAKKLGLEALICDDYLAVEAAMAEAAPELVLGTQMERHSAKRLGIPCAVISTPMHVQDVPARLSPQMGWEGANVIFDAWVHPLMMGLEEHLIGMFRHDFEFVDGHQSHLGHAGGAGAGNNHGTESVRASGCQDEAPSGQLIWTADGEAELKKIPFFVRGKVRRNAESYARTVGCKEISSETLYDAKAHYKA

58 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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