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Protein

Phycoerythrin alpha-2 chain, chloroplastic

Gene

cpeA2

Organism
Rhodomonas sp. (strain CS 24) (Chroomonas sp. (strain CS24))
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Light-harvesting photosynthetic tetrapyrrole chromophore-protein from the phycobiliprotein complex.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei5615,16-dihydrobiliverdin chromophore (covalent; via 1 link)2 Publications1
Binding sitei5815,16-dihydrobiliverdin chromophore2 Publications1
Binding sitei7815,16-dihydrobiliverdin chromophore2 Publications1

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

Bile pigment, Chromophore

Names & Taxonomyi

Protein namesi
Recommended name:
Phycoerythrin alpha-2 chain, chloroplastic
Gene namesi
Name:cpeA2
OrganismiRhodomonas sp. (strain CS 24) (Chroomonas sp. (strain CS24))
Taxonomic identifieri79257 [NCBI]
Taxonomic lineageiEukaryotaCryptophytaPyrenomonadalesPyrenomonadaceaeRhodomonas

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 37Chloroplast1 PublicationAdd BLAST37
ChainiPRO_000000282738 – 104Phycoerythrin alpha-2 chain, chloroplasticAdd BLAST67

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei415-hydroxylysine1 Publication1

Post-translational modificationi

Contains one covalently linked 15,16-dihydrobiliverdin chromophore.

Keywords - PTMi

Hydroxylation

Interactioni

Subunit structurei

Heterotetramer of 2 different alpha chains and 2 identical beta chains. The subunit composition could comprise of any combination of 2 out of 4 different alpha units with an invariant beta unit.2 Publications

Structurei

Secondary structure

1104
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Beta strandi44 – 52Combined sources9
Helixi71 – 74Combined sources4
Beta strandi75 – 83Combined sources9
Helixi88 – 101Combined sources14

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1QGWX-ray1.63B38-104[»]
1XF6X-ray1.10B38-104[»]
1XG0X-ray0.97B38-104[»]
ProteinModelPortaliP30943.
SMRiP30943.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP30943.

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni61 – 6315,16-dihydrobiliverdin chromophore3

Sequence similaritiesi

Belongs to the phycoerythrin family.Curated

Keywords - Domaini

Transit peptide

Family and domain databases

Gene3Di3.90.510.10. 1 hit.
InterProiIPR011070. Globular_prot_asu/bsu.
IPR004228. Phycoerythr_a.
[Graphical view]
PfamiPF02972. Phycoerythr_ab. 1 hit.
[Graphical view]
ProDomiPD019398. Phycoerythr_a/b_core. 1 hit.
[Graphical view] [Entries sharing at least one domain]
SUPFAMiSSF56568. SSF56568. 1 hit.

Sequencei

Sequence statusi: Complete.

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

P30943-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSAKIIAFSA VVATASAFAP TAGFVPRLRS GATSVNMAMD KSAKAPVITI
60 70 80 90 100
FDHRGCSRAP KEYTGAKAGG KDDEMMVKAQ SVKIEVSTGT AEGVLATSLA

KMTK
Length:104
Mass (Da):10,696
Last modified:May 27, 2002 - v2
Checksum:i1474D433E8CB4396
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti63 – 74YTGAK…GKDDE → TSKSGKSGQDDT AA sequence (PubMed:2226853).CuratedAdd BLAST12

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ006994 Genomic DNA. Translation: CAD20039.1.
PIRiT10881.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ006994 Genomic DNA. Translation: CAD20039.1.
PIRiT10881.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1QGWX-ray1.63B38-104[»]
1XF6X-ray1.10B38-104[»]
1XG0X-ray0.97B38-104[»]
ProteinModelPortaliP30943.
SMRiP30943.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Miscellaneous databases

EvolutionaryTraceiP30943.

Family and domain databases

Gene3Di3.90.510.10. 1 hit.
InterProiIPR011070. Globular_prot_asu/bsu.
IPR004228. Phycoerythr_a.
[Graphical view]
PfamiPF02972. Phycoerythr_ab. 1 hit.
[Graphical view]
ProDomiPD019398. Phycoerythr_a/b_core. 1 hit.
[Graphical view] [Entries sharing at least one domain]
SUPFAMiSSF56568. SSF56568. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiPHE2_RHDS2
AccessioniPrimary (citable) accession number: P30943
Secondary accession number(s): Q8VX02
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 1, 1993
Last sequence update: May 27, 2002
Last modified: November 2, 2016
This is version 88 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Miscellaneous

The light-harvesting system in Cryptophytes contains phycobiliprotein complexes. Unusually they are composed of either phycoerythrin (CPE) or phycocyanin (CPC) but never allophycocyanin (APC), with only one type of biliprotein being present in any one species. Unlike cyanobacteria or red algae these proteins are not arranged into higher-order phycobilisome complexes, and they are found in the thylakoid lumen.

Keywords - Technical termi

3D-structure, Direct protein sequencing

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. 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.