O22436 · CHLI_TOBAC

Function

function

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 (By similarity).

Catalytic activity

Activity regulation

Redox regulation; active in reducing conditions, inactive in oxidizing conditions. Thioredoxins f and m mediate the reversible reductive activation of oxidized CHLI (By similarity).

Pathway

Porphyrin-containing compound metabolism; chlorophyll biosynthesis.

Features

Showing features for binding site.

TypeIDPosition(s)Description
Binding site121-128ATP (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentchloroplast stroma
Molecular FunctionATP binding
Molecular FunctionATP hydrolysis activity
Molecular Functionmagnesium chelatase activity
Biological Processchlorophyll biosynthetic process
Biological Processphotosynthesis

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Magnesium-chelatase subunit ChlI, chloroplastic
  • EC number
  • Short names
    Mg-chelatase subunit I-1
  • Alternative names
    • Mg-protoporphyrin IX chelatase subunit ChlI

Gene names

    • Name
      CHLI

Organism names

  • Taxonomic identifier
  • Strain
    • cv. SR1
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > asterids > lamiids > Solanales > Solanaceae > Nicotianoideae > Nicotianeae > Nicotiana

Accessions

  • Primary accession
    O22436

Proteomes

Subcellular Location

Keywords

PTM/Processing

Features

Showing features for transit peptide, chain, disulfide bond.

TypeIDPosition(s)Description
Transit peptide1-50Chloroplast
ChainPRO_000000280451-426Magnesium-chelatase subunit ChlI, chloroplastic
Disulfide bond104↔195
Disulfide bond356↔398Inhibitory under oxidizing conditions

Keywords

Proteomic databases

Expression

Tissue specificity

Strongly expressed in young leaves and to a lesser extent in mature leaves.

Interaction

Subunit

The magnesium chelatase complex is a heterotrimer consisting of subunits CHLI, CHLD and CHLH.

Protein-protein interaction databases

Structure

Family & Domains

Sequence similarities

Belongs to the Mg-chelatase subunits D/I family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Sequence processing
    The displayed sequence is further processed into a mature form.
  • Length
    426
  • Mass (Da)
    46,627
  • Last updated
    1998-01-01 v1
  • Checksum
    42B7A6F04E1C3274
MASLLGTSSSAAAAILASTPLSSRSCKPAVFSLFPSSGQSQGRKFYGGIRVPVKKGRSQFHVAISNVATEINLLKNRVRNLLEESQRPVYPFAAIVGQDEMKLCLLLNVIDPKIGGVMIMGDRGTGKSTTVRSLVDLLPEIKVISGDPFNSDPDDQEVMSAEVRDKLRSGQQLPISRTKINMVDLPLGATEDRVCGTIDIEKALTEGVKAFEPGLLAKANRGILYVDEVNLLDDHLVDVLLDSAASGWNTVEREGISISHPARFILIGSGNPEEGELRPQLLDRFGMHAQVGTVRDAELRVKIVEERARFDKNPKEFRESYKAEQEKLQNQIDSARNALSAVTIDHDLRVKISKVCAELNVDGLRGDIVTNRAARALAALKGRDKVTPEDIATVIPNCLRHRLRKDPLESIDSGVLVVEKFYEVFA

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AF014053
EMBL· GenBank· DDBJ
AAB97153.1
EMBL· GenBank· DDBJ
mRNA

Similar Proteins

Disclaimer

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