Center for Structures of Membrane Proteins (CSMP)

Cryo-EM Structures of Apo and DDT-Bound P-Glycoprotein in Yellowfin Tuna.

The initial model was predicted using AlphaFold 2 software.

50 mM HEPES pH 8, 150 mM NaCl, 0.02% LMNG, 1mM MgCl2

Vitrified, monodisperse sample of transporter proteins in detergent micelles

The grids were glow discharged for 80sec at 12mA, with a relative humidity of 82% and temperature 21.5oC maintained throughout preparation. Samples of purified protein were concentrated to 1mg/mL and ultracentrifuged in a Beckmann Optima Ultracentrifuge for 15 minutes prior to grid preparation. The sample was applied via 2-S application mode by the Chameleon, allowed to wick for 530ms via the grid nanowires, and subsequently plunged into liquid ethane maintained at -180oC.

MEGKEEMEMLANAKPHKNGGLREVKDEDDKKTGEKKKEKGAKLPMVGPLALFRFADGKDIVLIFMGTVMSVAHGAVLPLM
CIVFGDMTDSFIKDSMTSHIQITQITNPQFTFTYPQSTLQEDMQSFAIYYSIMGFVVLVAAYMQVSFWALAAGRQVRRIR
KLFFHRIMQQDIGWFDVNETGELNTRLTDDVYKIQEGIGDKVGMLIQAFSTFITSFIIGFVKGWKLTLVILAVSPALGIS
AAIFGKVLTNFTAKEQTAYAKAGAVAEEVLSAIRTVFAFSGQDREIKRYHKNLEDAKNMGIKKAISANIAMGFTFLMIYL
SYALAFWYGSILIMSKEYTIGTVLTVFFVVLIGAFTMGQTSPNIQSFASARGAAHKVYSIIDNQPCIDSYSDAGFKPDSI
KGNIEFRNIHFNYPSRPDVKILNNMSLSVKSGQTIALVGSSGCGKSTTIQLLQRFYDPQEGSVSIDTHDIRSLNVRYLRE
MIGVVSQEPILFATTIAENIKYGRPDVTQQEIEQAAKEANAYDFIMNLPDKFETLVGDRGTQMSGGQKQRIAIARALVRN
PKILLLDEATSALDAESETIVQAALDKVRLGRTTIVVAHRLSTIRNADVIAGFHKGDVIELGTHSQLMEKQGVYYTLVTM
QTFQQVEDGEESEYEQAEDEKSPSVKSFSQSSLYRRKSTRGSSFAGSEGEREEKEKLRDVTDRAEEDENVPPVSFLKVMR
LNLSEWPYMALGTFCAIINGMMQPLFAVIFSKIIAVFAEPNQEIVRQKSEFFSLMFAAIGGVTFVTMFLQGFCFGKSGEL
LTLKLRLGAFKSMMRQDLGWFDNPKNSVGALTTRLATDAAQVQGATGVRMATLAQNIANLGTSIIISFVYGWELTLLILS
VVPIMAVAGSVQMQLLAGHAAEDKKELEKAGKIATEAIENIRTVASLTREPKFESLYQENLHVPYKNSQKKAHVYGFTFS
FSQAMIYFAYAGCFRFGAWLIKEGRMDAEGVYLVISAVLFGAMAVGEANSFTPNYAKAKMSASHLMMLMNREPAIDNLSE
EGQSPDKFDGNVRFEGVKFNYPSRPEVPILRGLNLKVSKGETLALVGSSGCGKSTTIQLLERFYDPMHGKVELDGISAKQ
LNIHWLRSQIGIVSQEPVLFDCTLAENIAYGDNSRTVTLEEIQAAAKAANIHSFIENLPQGYDTQAGDKGTQLSGGQKQR
IAIARAILRNPKLLLLDEATSALDTESEKVVQEALDQASRGRTCIVVAHRLSTIQNADRIAVFQAGVVVEQGTHQQLLAK
KGIYSMLVNTQMGHERNCIDHHHHHH

Center for Structures of Membrane Proteins

National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)

ABC Transporter, Membrane protein, TRANSPORT PROTEIN, Structural Genomics, PSI-Biology, Center for Structures of Membrane Proteins, CSMP