- EMDB-40451: E1435Q Ycf1 mutant in dephosphorylated state -
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Basic information
Entry
Database: EMDB / ID: EMD-40451
Title
E1435Q Ycf1 mutant in dephosphorylated state
Map data
Sharpened cryosparc map used for model building and refinement.
Sample
Complex: Ycf1
Protein or peptide: Metal resistance protein YCF1
Keywords
ABC transporter / MEMBRANE PROTEIN
Function / homology
Function and homology information
ABC-type Cd2+ transporter / ABC-type cadmium transporter activity / Recycling of bile acids and salts / Heme degradation / Cytoprotection by HMOX1 / Aspirin ADME / Atorvastatin ADME / Transport of RCbl within the body / Paracetamol ADME / Synthesis of Leukotrienes (LT) and Eoxins (EX) ...ABC-type Cd2+ transporter / ABC-type cadmium transporter activity / Recycling of bile acids and salts / Heme degradation / Cytoprotection by HMOX1 / Aspirin ADME / Atorvastatin ADME / Transport of RCbl within the body / Paracetamol ADME / Synthesis of Leukotrienes (LT) and Eoxins (EX) / P-type cadmium transporter activity / Sphingolipid de novo biosynthesis / ABC-family protein mediated transport / vacuole fusion, non-autophagic / ABC-type glutathione-S-conjugate transporter / ABC-type glutathione S-conjugate transporter activity / fungal-type vacuole membrane / response to metal ion / response to cadmium ion / ABC-type transporter activity / cell redox homeostasis / glutathione metabolic process / transmembrane transport / membrane raft / ATP hydrolysis activity / ATP binding Similarity search - Function
: / ABC transporter TMD0 domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter ...: / ABC transporter TMD0 domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase Similarity search - Domain/homology
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
NIH R00 GM11424
United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
NIH R01 AI156270
United States
Citation
Journal: Nat Commun / Year: 2024 Title: Structural basis for autoinhibition by the dephosphorylated regulatory domain of Ycf1. Authors: Nitesh Kumar Khandelwal / Thomas M Tomasiak / Abstract: Yeast Cadmium Factor 1 (Ycf1) sequesters glutathione and glutathione-heavy metal conjugates into yeast vacuoles as a cellular detoxification mechanism. Ycf1 belongs to the C subfamily of ATP Binding ...Yeast Cadmium Factor 1 (Ycf1) sequesters glutathione and glutathione-heavy metal conjugates into yeast vacuoles as a cellular detoxification mechanism. Ycf1 belongs to the C subfamily of ATP Binding Cassette (ABC) transporters characterized by long flexible linkers, notably the regulatory domain (R-domain). R-domain phosphorylation is necessary for activity, whereas dephosphorylation induces autoinhibition through an undefined mechanism. Because of its transient and dynamic nature, no structure of the dephosphorylated Ycf1 exists, limiting understanding of this R-domain regulation. Here, we capture the dephosphorylated Ycf1 using cryo-EM and show that the unphosphorylated R-domain indeed forms an ordered structure with an unexpected hairpin topology bound within the Ycf1 substrate cavity. This architecture and binding mode resemble that of a viral peptide inhibitor of an ABC transporter and the secreted bacterial WXG peptide toxins. We further reveal the subset of phosphorylation sites within the hairpin turn that drive the reorganization of the R-domain conformation, suggesting a mechanism for Ycf1 activation by phosphorylation-dependent release of R-domain mediated autoinhibition.
Details: Solution were made fresh in cold distilled water and final pH was adjusted to 7.0 with HCl of cold buffer. The digitonin detergent was added to final .06 % in buffer after pH adjustment.
Grid
Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 400 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec.
Vitrification
Cryogen name: ETHANE / Chamber humidity: 80 % / Chamber temperature: 283.15 K / Instrument: LEICA EM GP
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Electron microscopy
Microscope
TFS KRIOS
Image recording
Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 5904 / Average exposure time: 3.0 sec. / Average electron dose: 52.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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