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Protein

7-hydroxymethyl chlorophyll a reductase, chloroplastic

Gene

HCAR

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Probable iron-sulfur flavoprotein that converts 7-hydroxymethyl chlorophyll a to chlorophyll a using ferredoxin as a reducing equivalent. Catalyzes the reduction of a hydroxymethyl group to a methyl group. Belongs to the chlorophyll catabolic enzymes (CCEs).1 Publication

Catalytic activityi

71-hydroxychlorophyllide a + 2 reduced ferredoxin + 2 H+ = chlorophyll a + 2 oxidized ferredoxin + H2O.1 Publication

Cofactori

Protein has several cofactor binding sites:

GO - Molecular functioni

GO - Biological processi

  • chlorophyll cycle Source: TAIR
  • chlorophyll metabolic process Source: TAIR
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Ligandi

FAD, Flavoprotein, Iron, Iron-sulfur, Metal-binding

Enzyme and pathway databases

BioCyciARA:AT1G04620-MONOMER.
MetaCyc:AT1G04620-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
7-hydroxymethyl chlorophyll a reductase, chloroplastic (EC:1.17.7.2)
Gene namesi
Name:HCAR
Synonyms:HMCR
Ordered Locus Names:At1g04620
ORF Names:T1G11.13
OrganismiArabidopsis thaliana (Mouse-ear cress)
Taxonomic identifieri3702 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
Proteomesi
  • UP000006548 Componenti: Chromosome 1

Organism-specific databases

TAIRiAT1G04620.

Subcellular locationi

GO - Cellular componenti

  • chloroplast Source: TAIR
Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Plastid

Pathology & Biotechi

Disruption phenotypei

No visible phenotype under normal growth conditions, but plants accumulate 7-hydroxymethyl chlorophyll a in green leaves.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 20ChloroplastSequence analysisAdd BLAST20
ChainiPRO_000041561521 – 4627-hydroxymethyl chlorophyll a reductase, chloroplasticAdd BLAST442

Proteomic databases

PaxDbiQ8GS60.

Expressioni

Developmental stagei

Constantly expressed throughout development.1 Publication

Gene expression databases

GenevisibleiQ8GS60. AT.

Interactioni

Subunit structurei

Interacts with SGR1, the chlorophyll catabolic enzymes (CCEs) NYC1, NOL and RCCR, and the LHCII complex. Part of a SGR1-CCE-LHCII complex, which acts in chlorophyll breakdown.1 Publication

Protein-protein interaction databases

BioGridi24707. 8 interactors.
IntActiQ8GS60. 1 interactor.
STRINGi3702.AT1G04620.1.

Structurei

Secondary structure

1462
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Beta strandi44 – 46Combined sources3
Helixi59 – 61Combined sources3
Helixi67 – 69Combined sources3
Helixi71 – 78Combined sources8
Helixi86 – 89Combined sources4
Helixi90 – 97Combined sources8
Helixi107 – 112Combined sources6
Beta strandi116 – 125Combined sources10
Beta strandi130 – 133Combined sources4
Helixi135 – 145Combined sources11
Beta strandi150 – 158Combined sources9
Beta strandi161 – 170Combined sources10
Helixi173 – 177Combined sources5
Helixi193 – 197Combined sources5
Turni198 – 200Combined sources3
Beta strandi203 – 208Combined sources6
Helixi210 – 218Combined sources9
Helixi220 – 223Combined sources4
Beta strandi226 – 233Combined sources8
Helixi241 – 251Combined sources11
Beta strandi257 – 263Combined sources7
Beta strandi267 – 273Combined sources7
Beta strandi278 – 282Combined sources5
Helixi283 – 285Combined sources3
Turni288 – 290Combined sources3
Helixi291 – 293Combined sources3
Helixi297 – 300Combined sources4
Beta strandi310 – 316Combined sources7
Helixi327 – 329Combined sources3
Beta strandi332 – 336Combined sources5
Helixi339 – 346Combined sources8
Helixi347 – 351Combined sources5
Beta strandi352 – 356Combined sources5
Beta strandi359 – 361Combined sources3
Helixi364 – 375Combined sources12
Turni378 – 380Combined sources3
Helixi389 – 402Combined sources14
Helixi407 – 428Combined sources22
Helixi430 – 437Combined sources8
Helixi440 – 448Combined sources9
Helixi454 – 459Combined sources6

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
5DQRX-ray2.70A/B/C/D/E/F26-462[»]
ProteinModelPortaliQ8GS60.
SMRiQ8GS60.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the FrhB family.Curated

Keywords - Domaini

Transit peptide

Phylogenomic databases

eggNOGiENOG410IGX7. Eukaryota.
COG1035. LUCA.
HOGENOMiHOG000148137.
InParanoidiQ8GS60.
KOiK18010.
OMAiYVLGTPC.
OrthoDBiEOG09360ALT.
PhylomeDBiQ8GS60.

Family and domain databases

InterProiIPR007516. Co_F420_Hydgase/DH_bsu_N.
IPR007525. FrhB_FdhB_C.
[Graphical view]
PfamiPF04432. FrhB_FdhB_C. 1 hit.
PF04422. FrhB_FdhB_N. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q8GS60-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MITVVTSRLS LLPPVFSVVN SSSSRSKDMN LEPKKKVKLR EDWREKSRPI
60 70 80 90 100
PPGGTYPAKD HCSQCGLCDT YYIAHVKEAC AFLGDGMSRI ESLEPVVHGR
110 120 130 140 150
GRKADSLQDT YFGVHQEQLY ARKLKPVEGA QWTGIVTTIA IEMLKSNMVE
160 170 180 190 200
AVVCVQSDPE DRLSPRPVLA RTPEEVLAAR GVKPTLSPNL NTLELIEASG
210 220 230 240 250
VKRLLFCGVG CQVQALRSVE QHLNLEKLYV LGTNCVDNGT RDGLDKFLKA
260 270 280 290 300
ASKEPETVLH YEFMQDYKVQ LKHLDGHIEE VPYFSLPAND LVDVIAPSCY
310 320 330 340 350
SCFDYTNALA DLVIGYMGVP KYSGLNMTDH PQYITVRNER GKEMLSLVEN
360 370 380 390 400
LLEITPTISS GDRRPFVTET VKADDAAKFG QGPAQPAPLF VGNIIAFILN
410 420 430 440 450
LVGPKGLEFA RYSLDYHTIR NYLYVNRKWG KQRANTHMPS YAKKIVEMYN
460
KNGQIDKMLS KK
Length:462
Mass (Da):51,661
Last modified:March 1, 2003 - v1
Checksum:i71DB353FB5DB1AA5
GO

Sequence cautioni

The sequence AAB80625 differs from that shown. Reason: Erroneous gene model prediction.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AC002376 Genomic DNA. Translation: AAB80625.1. Sequence problems.
CP002684 Genomic DNA. Translation: AEE27722.1.
AK117982 mRNA. Translation: BAC42618.1.
BT002029 mRNA. Translation: AAN72040.1.
BT006603 mRNA. Translation: AAP31947.1.
PIRiH86178.
RefSeqiNP_171956.2. NM_100341.4.
UniGeneiAt.42441.

Genome annotation databases

EnsemblPlantsiAT1G04620.1; AT1G04620.1; AT1G04620.
GeneIDi839472.
GrameneiAT1G04620.1; AT1G04620.1; AT1G04620.
KEGGiath:AT1G04620.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AC002376 Genomic DNA. Translation: AAB80625.1. Sequence problems.
CP002684 Genomic DNA. Translation: AEE27722.1.
AK117982 mRNA. Translation: BAC42618.1.
BT002029 mRNA. Translation: AAN72040.1.
BT006603 mRNA. Translation: AAP31947.1.
PIRiH86178.
RefSeqiNP_171956.2. NM_100341.4.
UniGeneiAt.42441.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
5DQRX-ray2.70A/B/C/D/E/F26-462[»]
ProteinModelPortaliQ8GS60.
SMRiQ8GS60.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi24707. 8 interactors.
IntActiQ8GS60. 1 interactor.
STRINGi3702.AT1G04620.1.

Proteomic databases

PaxDbiQ8GS60.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiAT1G04620.1; AT1G04620.1; AT1G04620.
GeneIDi839472.
GrameneiAT1G04620.1; AT1G04620.1; AT1G04620.
KEGGiath:AT1G04620.

Organism-specific databases

TAIRiAT1G04620.

Phylogenomic databases

eggNOGiENOG410IGX7. Eukaryota.
COG1035. LUCA.
HOGENOMiHOG000148137.
InParanoidiQ8GS60.
KOiK18010.
OMAiYVLGTPC.
OrthoDBiEOG09360ALT.
PhylomeDBiQ8GS60.

Enzyme and pathway databases

BioCyciARA:AT1G04620-MONOMER.
MetaCyc:AT1G04620-MONOMER.

Miscellaneous databases

PROiQ8GS60.

Gene expression databases

GenevisibleiQ8GS60. AT.

Family and domain databases

InterProiIPR007516. Co_F420_Hydgase/DH_bsu_N.
IPR007525. FrhB_FdhB_C.
[Graphical view]
PfamiPF04432. FrhB_FdhB_C. 1 hit.
PF04422. FrhB_FdhB_N. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiHCAR_ARATH
AccessioniPrimary (citable) accession number: Q8GS60
Secondary accession number(s): O23023
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 22, 2012
Last sequence update: March 1, 2003
Last modified: November 30, 2016
This is version 84 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.