Q01952 (PHAB_SYNY3) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Allophycocyanin beta chain

Gene names

Name:	apcB
Ordered Locus Names:	slr1986

Organism

Synechocystis sp. (strain PCC 6803 / Kazusa) [Reference proteome] [HAMAP]

Taxonomic identifier

1111708 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Cyanobacteria › Oscillatoriophycideae › Chroococcales › Synechocystis › Synechocystis sp. PCC 6803

Protein attributes

Sequence length	161 AA.
Sequence status	Complete.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	Light-harvesting photosynthetic bile pigment-protein from the phycobiliprotein complex. Allophycocyanin has a maximum absorption at approximately 650 nanometers.
Subunit structure	Heterodimer of an alpha and a beta chain By similarity.
Subcellular location	Cellular thylakoid membrane; Peripheral membrane protein; Cytoplasmic side By similarity. Note: Forms the core of the phycobilisome By similarity.
Post-translational modification	Contains one covalently linked phycocyanobilin chromophore By similarity.
Sequence similarities	Belongs to the phycobiliprotein family.

Ontologies

Keywords
Biological process	Electron transport Photosynthesis Transport
Cellular component	Membrane Phycobilisome Thylakoid
Ligand	Bile pigment Chromophore
PTM	Methylation
Technical term	Complete proteome Direct protein sequencing Reference proteome
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	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 – 161	161	Allophycocyanin beta chain		PRO_0000199105
Sites
	Binding site	81	1	Phycocyanobilin chromophore (covalent; via 1 link) By similarity
Amino acid modifications
	Modified residue	71	1	N4-methylasparagine By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q01952 [UniParc]. Last modified April 1, 1993. Version 1. Checksum: 63F01E5903BA1B83	FASTA	161	17,216
	10 20 30 40 50 60 MQDAITAVIN SADVQGKYLD GAAMDKLKSY FASGELRVRA ASVISANAAT IVKEAVAKSL 70 80 90 100 110 120 LYSDVTRPGG NMYTTRRYAA CIRDLDYYLR YATYAMLAGD ASILDERVLN GLKETYNSLG 130 140 150 160 VPISSTVQAI QAIKEVTASL VGADAGKEMG VYLDYICSGL S

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Excitation energy transfer from phycocyanin to chlorophyll in an apcA-defective mutant of Synechocystis sp. PCC 6803." Su X., Goodman P., Bogorad L. J. Biol. Chem. 267:22944-22950(1992) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions." Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y., Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T., Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S. , Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S. DNA Res. 3:109-136(1996) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: PCC 6803 / Kazusa.
[3]	"Towards a proteome project of cyanobacterium Synechocystis sp. strain PCC6803: linking 130 protein spots with their respective genes." Sazuka T., Ohara O. Electrophoresis 18:1252-1258(1997) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 1-20.

Cross-references

Sequence databases
EMBL GenBank DDBJ	M77135 Genomic DNA. Translation: AAA27277.1. BA000022 Genomic DNA. Translation: BAA17875.1.
PIR	B44462.
RefSeq	NP_441195.1. NC_000911.1. YP_005651252.1. NC_017277.1. YP_007451077.1. NC_020286.1.
3D structure databases
ProteinModelPortal	Q01952.
SMR	Q01952. Positions 1-161.
ModBase	Search...
Protein-protein interaction databases
IntAct	Q01952. 2 interactions.
STRING	1148.slr1986.
Proteomic databases
PaxDb	Q01952.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	BAA17875; BAA17875; BAA17875.
GeneID	12255660. 14616733. 954531.
KEGG	syn:slr1986. syy:SYNGTS_1299.
PATRIC	23839713. VBISynSp132158_1418.
Phylogenomic databases
eggNOG	NOG11282.
HOGENOM	HOG000233274.
KO	K02093.
OMA	ACIRDMD.
ProtClustDB	CLSK893028.
Family and domain databases
Gene3D	1.10.490.20. 1 hit.
InterPro	IPR006245. ApcB. 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.
TIGRFAMs	TIGR01337. apcB. 1 hit.
ProtoNet	Search...

Entry information

Entry name

PHAB_SYNY3

Accession

Primary (citable) accession number: Q01952

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 1, 1993
Last sequence update:	April 1, 1993
Last modified:	May 1, 2013
This is version 92 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program