P11392 (PHEA_PORCR) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
B-phycoerythrin alpha chain

Gene names

Name:

cpeA

Encoded on

Plastid; Chloroplast

Organism

Porphyridium cruentum (Red alga)

Taxonomic identifier

35688 [NCBI]

Taxonomic lineage

cellular organisms › Eukaryota › Rhodophyta › Bangiophyceae › Porphyridiales › Porphyridiaceae › Porphyridium

Protein attributes

Sequence length	164 AA.
Sequence status	Complete.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	Light-harvesting photosynthetic bile pigment-protein from the phycobiliprotein complex.
Subunit structure	Heteropolymer of 6 alpha, 6 beta and one gamma chain By similarity.
Subcellular location	Plastid › chloroplast thylakoid membrane; Peripheral membrane protein; Stromal side By similarity. Note: Forms the periphery of the phycobilisome rod By similarity.
Post-translational modification	Contains two covalently linked bilin chromophores.
Sequence similarities	Belongs to the phycobiliprotein family.

Ontologies

Keywords
Biological process	Electron transport Photosynthesis Transport
Cellular component	Chloroplast Membrane Phycobilisome Plastid Thylakoid
Ligand	Bile pigment Chromophore
Technical term	3D-structure Direct protein sequencing
Gene Ontology (GO)
Biological_process	electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW photosynthesis Inferred from electronic annotation. Source: UniProtKB-KW protein-chromophore linkage Inferred from electronic annotation. Source: UniProtKB-KW
Cellular_component	chloroplast thylakoid membrane Inferred from electronic annotation. Source: UniProtKB-SubCell phycobilisome Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

Feature key

Position(s)

Length

Description

Graphical view

Feature identifier

Molecule processing

Chain

1 – 164

164

B-phycoerythrin alpha chain

PRO_0000199176

Sites

Binding site

82

1

Phycoerythrobilin chromophore 1 (covalent; via 1 link)

Binding site

139

1

Phycoerythrobilin chromophore 2 (covalent; via 1 link)

Secondary structure

1

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164

Helix Strand Turn

Details...

Helix

4 – 15

12

Helix

21 – 62

42

Helix

64 – 67

4

Helix

76 – 99

24

Helix

103 – 108

6

Turn

109 – 112

4

Helix

113 – 119

7

Helix

124 – 137

14

Turn

140 – 143

4

Helix

146 – 162

17

Sequences

	Sequence		Length	Mass (Da)
	P11392 [UniParc]. Last modified July 1, 1989. Version 1. Checksum: A704CE21D52B8D7E	FASTA	164	17,817
	10 20 30 40 50 60 MKSVITTVVS AADAAGRFPS NSDLESIQGN IQRSAARLEA AEKLAGNHEA VVKEAGDACF 70 80 90 100 110 120 AKYAYLKNPG EAGENQEKIN KCYRDVDHYM RLVNYDLVVG GTGPLDEWGI AGAREVYRTL 130 140 150 160 NLPTSAYVAS IAYTRDRLCV PRDMSAQAGV EFSAYLDYLI NALS

References

[1]	"The complete amino-acid sequence of the alpha and beta subunits of B-phycoerythrin from the rhodophytan alga Porphyridium cruentum." Sidler W., Kumpf B., Suter F., Klotz A.V., Glazer A.N., Zuber H. Biol. Chem. Hoppe-Seyler 370:115-124(1989) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE.
[2]	"Bilin attachment sites in the alpha and beta subunits of B-phycoerythrin. Amino acid sequence studies." Lundell D.J., Glazer A.N., DeLange R.J., Brown D.M. J. Biol. Chem. 259:5472-5480(1984) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 79-84 AND 136-142, CHROMOPHORE BINDING AT CYS-82 AND CYS-139.
+	Additional computationally mapped references.

Cross-references

Sequence databases

PIR

S02817.

3D structure databases

PDBe
RCSB PDB
PDBj

Entry	Method	Resolution (Å)	Chain	Positions	PDBsum
3V57	X-ray	1.70	A/C	1-164	[»]
3V58	X-ray	1.85	A/C	1-164	[»]

ProteinModelPortal

P11392.

SMR

P11392. Positions 1-164.

ModBase

Search...

Protocols and materials databases

StructuralBiologyKnowledgebase

Search...

Family and domain databases

Gene3D

1.10.490.20. 1 hit.

InterPro

IPR009050. Globin-like.
IPR012128. Phycobilisome_asu/bsu.
[Graphical view]

Pfam

PF00502. Phycobilisome. 1 hit.
[Graphical view]

PIRSF

PIRSF000081. Phycocyanin. 1 hit.

SUPFAM

SSF46458. Globin_like. 1 hit.

ProtoNet

Search...

Entry information

Entry name

PHEA_PORCR

Accession

Primary (citable) accession number: P11392

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 1, 1989
Last sequence update:	July 1, 1989
Last modified:	April 3, 2013
This is version 71 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)