NCBI Accession #
NP_193583.1
NCBI GenBank Nucleotide #
NM_117962.3
NCBI Official Full Name
P-loop containing nucleoside triphosphate hydrolases superfamily protein
NCBI Official Symbol
CHLI1
NCBI Official Synonym Symbols
CH-42; CH42; CHL11; CHLI-1; CHLORINA 42; F28J12.140; F28J12_140; LOST1; low temperature with open-stomata 1; PROTOPORPHYRIN-IX MG-CHELATASE
NCBI Protein Information
P-loop containing nucleoside triphosphate hydrolases superfamily protein
NCBI Summary
Encodes the CHLI subunit of magnesium chelatase which is required for chlorophyll biosynthesis. All four cysteine residues of the protein form two disulfide bonds (Cys102-Cys193 and Cys354-Cys396) under oxidized conditions but are fully reduced by reduction. It was suggested that the redox state of CHLI is regulated in vivo by the change of the redox environment in the chloroplasts probably via the Trx system.
UniProt Synonym Gene Names
CH42; CS; Mg-chelatase subunit I-1
UniProt Protein Name
Magnesium-chelatase subunit ChlI-1, chloroplastic
UniProt Synonym Protein Names
Mg-protoporphyrin IX chelatase subunit ChlI-1; Protein CHLORINA 42
UniProt Primary Accession #
P16127
UniProt Secondary Accession #
Q0WUK7
UniProt Related Accession #
P16127
UniProt Comments
Involved in chlorophyll biosynthesis. Catalyzes the insertion of magnesium ion into protoporphyrin IX to yield Mg-protoporphyrin IX. The magnesium-chelatase is a complex of three subunits, CHLI, CHLD and CHLH. The reaction takes place in two steps, with an ATP-dependent activation followed by an ATP-dependent chelation step. Possesses high affinity for ATP and may play a major role in chlorophyll biosynthesis. Does not bind abscisic acid (ABA), but is a positive regulator of ABA signaling.