7SQ9

Cryo-EM structure of mouse temsirolimus/PI(3,5)P2-bound TRPML1 channel at 2.11 Angstrom resolution

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.11 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Structural mechanism of allosteric activation of TRPML1 by PI(3,5)P 2 and rapamycin.

Gan, N., Han, Y., Zeng, W., Wang, Y., Xue, J., Jiang, Y.

(2022) Proc Natl Acad Sci U S A 119

  • DOI: 10.1073/pnas.2120404119
  • Primary Citation of Related Structures:  
    7SQ6, 7SQ7, 7SQ8, 7SQ9

  • PubMed Abstract: 

    • Transient receptor potential mucolipin 1 (TRPML1) is a Ca 2+ -permeable, nonselective cation channel ubiquitously expressed in the endolysosomes of mammalian cells and its loss-of-function mutations are the direct cause of type IV mucolipidosis (MLIV), an autosomal recessive lysosomal storage disease ...

    Transient receptor potential mucolipin 1 (TRPML1) is a Ca 2+ -permeable, nonselective cation channel ubiquitously expressed in the endolysosomes of mammalian cells and its loss-of-function mutations are the direct cause of type IV mucolipidosis (MLIV), an autosomal recessive lysosomal storage disease. TRPML1 is a ligand-gated channel that can be activated by phosphatidylinositol 3,5-bisphosphate [PI(3,5)P 2 ] as well as some synthetic small-molecule agonists. Recently, rapamycin has also been shown to directly bind and activate TRPML1. Interestingly, both PI(3,5)P 2 and rapamycin have low efficacy in channel activation individually but together they work cooperatively and activate the channel with high potency. To reveal the structural basis underlying the synergistic activation of TRPML1 by PI(3,5)P 2 and rapamycin, we determined the high-resolution cryoelectron microscopy (cryo-EM) structures of the mouse TRPML1 channel in various states, including apo closed, PI(3,5)P 2 -bound closed, and PI(3,5)P 2 /temsirolimus (a rapamycin analog)-bound open states. These structures, combined with electrophysiology, elucidate the molecular details of ligand binding and provide structural insight into how the TRPML1 channel integrates two distantly bound ligand stimuli and facilitates channel opening.

    Organizational Affiliation: 

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9040.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mucolipin-1A, B, C, D580Mus musculusMutation(s): 0 
Gene Names: Mcoln1, Trpml1
Membrane Entity: Yes 
UniProt
Find proteins for Q99J21 (Mus musculus)
Explore Q99J21 
Go to UniProtKB:  Q99J21
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99J21
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE, F, G, H 2N/AN-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A4I
Query on A4I
Download Ideal Coordinates CCD File 
J [auth A],
N [auth B],
P [auth C],
R [auth D]		(1R,2R,4S)-4-{(2R)-2-[(3S,6R,7E,9R,10R,12R,14S,15E,17E,19E,21S,23S,26R,27R,30S,34aS)-9,27-dihydroxy-10,21-dimethoxy-6,8,12,14,20,26-hexamethyl-1,5,11,28,29-pentaoxo-1,4,5,6,9,10,11,12,13,14,21,22,23,24,25,26,27,28,29,31,32,33,34,34a-tetracosahydro-3H-23,27-epoxypyrido[2,1-c][1,4]oxazacyclohentriacontin-3-yl]propyl}-2-methoxycyclohexyl 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoate
C56 H87 N O16
CBPNZQVSJQDFBE-FUXHJELOSA-N		 Ligand Interaction
EUJ
Query on EUJ
Download Ideal Coordinates CCD File 
I [auth A],
M [auth B],
O [auth C],
Q [auth D]		(2R)-3-{[(S)-hydroxy{[(1S,2R,3R,4S,5S,6R)-2,4,6-trihydroxy-3,5-bis(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propane-1,2-diyl dioctanoate
C25 H49 O19 P3
QXHVLVSULWMTCV-DICZBTHZSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
K [auth A],
L [auth A]		SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.11 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM140892
Welch FoundationUnited StatesI-1578

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-02
    Type: Initial release
  • Version 1.1: 2022-02-16
    Changes: Data collection, Database references
  • Version 1.2: 2022-02-23
    Changes: Database references