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UniProt functional annotation for Q18DH8 | ||
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| UniProt code: Q18DH8. |
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| Organism: | |
Haloquadratum walsbyi (strain DSM 16790 / HBSQ001). |
| Taxonomy: | |
Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Haloferacales; Haloferacaceae; Haloquadratum. |
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| Function: | |
Light-driven proton pump. The chromophore contains 78% all- trans- and 22% 13-cis-retinal in the dark and 90% all-trans- and 10% 13-cis-retinal upon illumination with >500 nm light. {ECO:0000269|PubMed:21135094, ECO:0000269|PubMed:22248212, ECO:0000269|PubMed:23720753}. |
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| Biophysicochemical properties: | |
Absorption: Abs(max)=552 nm {ECO:0000269|PubMed:21135094, ECO:0000269|PubMed:22248212}; Note=In light-adapted form, max=555 nm. In the mutated form, max=498 nm.; |
| Subcellular location: | |
Cell membrane {ECO:0000269|PubMed:22248212}; Multi-pass membrane protein {ECO:0000269|PubMed:22248212}. |
| Ptm: | |
The covalent binding of retinal to the apoprotein, bacterioopsin, generates bacteriorhodopsin. {ECO:0000250}. |
| Miscellaneous: | |
Different protein aggregation states can be observed, leading to variations in the absorbance maxima. {ECO:0000305|PubMed:22248212}. |
| Similarity: | |
Belongs to the archaeal/bacterial/fungal opsin family. {ECO:0000305}. |
Annotations taken from UniProtKB at the EBI.