2026-03-28_00000160|medium|9U9Z

Cryo-EM structure of cyanobacterial bicarbonate transporter CmpBCD; Electron microscopy 3.40Å
Protein #1 280 residues (90% resolved)

MAASIGNRNGSFGRSLSKFWEKNAQNWALPIVGILGFLIVWQLLTWTGLLKLPGPWDIMAEKSTRNLLLYPFFDRGGTDKGLFWQTLASFERVAKGYSIAAIVGISVGILVGTNAVIDKALDPLFQFLRTVPPLAWVPIALAALRQNEPAALFVIFITAVWPILLNTAVGVKQIPQDYRNVSRVLQLSKQKYFFKILIPSALPYIFTGLRISIGLAWLAIIAAEIIMSGIVGIGFFIWNSYTNDKVGEVILALVYIGAVGLILDRAVAWLQNVILPEEQK

MAASIGNRNGSFGRSLSKFWEKNAQNWALPIVGILGFLIVWQLLTWTGLLKLPGPWDIMAEKSTRNLLLYPFFDRGGTDKGLFWQTLASFERVAKGYSIAAIVGISVGILVGTNAVIDKALDPLFQFLRTVPPLAWVPIALAALRQNEPAALFVIFITAVWPILLNTAVGVKQIPQDYRNVSRVLQLSKQKYFFKILIPSALPYIFTGLRISIGLAWLAIIAAEIIMSGIVGIGFFIWNSYTNDKVGEVILALVYIGAVGLILDRAVAWLQNVILPEEQK
Protein #2 665 residues (99% resolved)

MQDFVLVDQVERTFPLGGGKEYIALKGIDLQIRKGEFISLIGHSGCGKSTLLNMIAGLDLPSGGVVMLEDERVTRPGPDRMVVFQNYSLLPWLSVRENVALAVDEVLSHLPKGERHDLVERYVNMVGLAHAIDKPPTQLSGGMRQRVAIARALAVRPKLLLLDEPFGALDALTRGNLQEKLMQICNEDQITAVMVTHDVDEAVLLSDRIVMLTNGPASKIGNILEVDIPRPRQRMEAVNHPSYYSLRSEIIYFLNQQKRVKKLNARKVTTVAKHGLEKVNLEIGFVPLTACAPIAVAKEKGFFEKHGLDEVSLVRETSWRGIVDGISGGYLDAAQMPSGLPMWLTLGGAGACKPIVTALTMTRNGNAITLDKHFYDRGIHTLADFKAMLQSTRDRQHRMGVVHPSSMHNLLLRYWLAAGGIDPDLDVELKTIPPAQMVVDLKAGSIDGFCVGEPWNFRAAMENIGFTVATDLEIWNGHPGKVLGVREDWANAYPNTHIALVKALLEACMYCADPNNAEEIRQILSRRAYVSTNVNYIHLGNPDDVTCALDTPMREPAHHQFYGAGVNRPSRSEHLWHITQMARWGDVPFPRNWVEVLEKTCRVGVFSTAARELGLTDITYSRNAIQLFDDIPFNAEDPIGYLNHLDIKRNITMAEIAMESVRMVA

MQDFVLVDQVERTFPLGGGKEYIALKGIDLQIRKGEFISLIGHSGCGKSTLLNMIAGLDLPSGGVVMLEDERVTRPGPDRMVVFQNYSLLPWLSVRENVALAVDEVLSHLPKGERHDLVERYVNMVGLAHAIDKPPTQLSGGMRQRVAIARALAVRPKLLLLDEPFGALDALTRGNLQEKLMQICNEDQITAVMVTHDVDEAVLLSDRIVMLTNGPASKIGNILEVDIPRPRQRMEAVNHPSYYSLRSEIIYFLNQQKRVKKLNARKVTTVAKHGLEKVNLEIGFVPLTACAPIAVAKEKGFFEKHGLDEVSLVRETSWRGIVDGISGGYLDAAQMPSGLPMWLTLGGAGACKPIVTALTMTRNGNAITLDKHFYDRGIHTLADFKAMLQSTRDRQHRMGVVHPSSMHNLLLRYWLAAGGIDPDLDVELKTIPPAQMVVDLKAGSIDGFCVGEPWNFRAAMENIGFTVATDLEIWNGHPGKVLGVREDWANAYPNTHIALVKALLEACMYCADPNNAEEIRQILSRRAYVSTNVNYIHLGNPDDVTCALDTPMREPAHHQFYGAGVNRPSRSEHLWHITQMARWGDVPFPRNWVEVLEKTCRVGVFSTAARELGLTDITYSRNAIQLFDDIPFNAEDPIGYLNHLDIKRNITMAEIAMESVRMVA
Protein #3 278 residues (92% resolved)

MTQTILEHTNQIAQIPPQESFLRIENVSKIYPTPKGEYVVLKDVNLHIQEGEFICLIGHSGCGKSTLLNMVGGFSKPSIGEVTVNGKLITKPGPDRMVVFQGYALLPWLTVYENVMLAVDSVNPNLSKSEKNDIVRHHLAMVGLSEAAEKKPTQISGGMKQRVSIARALAIRPEVLILDEPFGALDAITKEELQEELLQIWTEHRCTVLMITHDIDEALFLADRLVMMTNGPAANIGEIMRIPFPRPRDRAQIMEDPLYYDLRNTALDFLYNRFAHDE

MTQTILEHTNQIAQIPPQESFLRIENVSKIYPTPKGEYVVLKDVNLHIQEGEFICLIGHSGCGKSTLLNMVGGFSKPSIGEVTVNGKLITKPGPDRMVVFQGYALLPWLTVYENVMLAVDSVNPNLSKSEKNDIVRHHLAMVGLSEAAEKKPTQISGGMKQRVSIARALAIRPEVLILDEPFGALDAITKEELQEELLQIWTEHRCTVLMITHDIDEALFLADRLVMMTNGPAANIGEIMRIPFPRPRDRAQIMEDPLYYDLRNTALDFLYNRFAHDE
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Reference