PDB entry 2ei4

Trimeric complex of archaerhodopsin-2

The structure was published by Yoshimura, K. and Kouyama, T., in 2008 in a paper entitled "Structural role of bacterioruberin in the trimeric structure of archaerhodopsin-2" (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 2.1 Å and deposited in 2007.

The experimental data on which the structure is based was also deposited.

The PDB entry contains the structure of Archaerhodopsin-2. This molecule has the UniProt identifier P29563 (BACR2_HALS2). The sample contained 253 residues which is 98% of the natural sequence. Out of 253 residues 238 were observed and are deposited in the PDB.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms homotrimers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):

Chain	Name	UniProt	Name of source organism	% of UniProt sequence present in the sample	Residues in the sample molecules	% of residues observed
A	Archaerhodopsin-2	P29563 (7-259) (BACR2_HALS2)	Halobacterium sp. AUS-2	98%	253	94%

This entry contains 1 unique UniProt protein:

UniProt accession	Name	Organism	PDB
P29563 (7 - 259)	Archaerhodopsin-2	Halobacterium sp. AUS-2

Chain	Structural classification (CATH)	Sequence family (Pfam)
A (P29563)	Rhopdopsin 7-helix transmembrane proteins	Bacteriorhodopsin-like protein

Chain ID	Molecular function (GO)	Cellular component (GO)	Biological process (GO)
A (P29563)	Receptor activity , Photoreceptor activity	Plasma membrane , Membrane , Integral to membrane	Transport , Ion transport , Phototransduction , Proton transport , Protein-chromophore linkage , Response to stimulus

Chain	InterPro annotation
A	Rhodopsin, archaeal/bacterial/fungal , Rhodopsin, retinal binding site