Protein
Nitrate/nitrite binding protein NrtA
Organism
Synechococcus elongatus (strain PCC 7942)
Function
Part of the ABC transporter complex NrtABCD involved in nitrate uptake (PubMed:16594065, PubMed:8437564, PubMed:7767600). The complex is probably also involved in nitrite transport (PubMed:7767600). NrtA is the substrate-binding protein (PubMed:8437564, PubMed:7767600, PubMed:9006953). Binds both nitrate and nitrite with high affinity (PubMed:9006953).
Similarity
Belongs to the CmpA/NrtA family.
Sequence
MSQFSRRKFLLTAGGTAAAALWLNACGSNNSSTDTTGSTSTPAPSGTSGGDAPEVKGVTLGFIALTDAAPVIIALEKGLFAKYGLPDTKVVKQTSWAVTRDNLELGSDRGGIDGAHILSPMPYLLTAGTITKSQKPLPMYILARLNTQGQGISLSNEFLAEKVQIKDPKLKAIADQKKASGKLLKAAVTFPGGTHDLWMRYWLAANGIDPNNDADLVVIPPPQMVANMQTGTMDTFCVGEPWNARLVNKKLGYTAAVTGELWKFHPEKALTIRADWADKNPKATMALLKAVQEAQIWCEDPANLDELCQITAQDKYFKTSVEDIKPRLQGDIDYGDGRSVKNSDLRMRFWSENASFPYKSHDLWFLTEDIRWGYLPASTDTKALIEKVNRSDLWREAAKAIGREQDIPASDSRGVETFFDGVTFDPENPQAYLDGLKFKAIKA