6M49

cryo-EM structure of Scap/Insig complex in the present of 25-hydroxyl cholesterol.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A structure of human Scap bound to Insig-2 suggests how their interaction is regulated by sterols.

Yan, R.Cao, P.Song, W.Qian, H.Du, X.Coates, H.W.Zhao, X.Li, Y.Gao, S.Gong, X.Liu, X.Sui, J.Lei, J.Yang, H.Brown, A.J.Zhou, Q.Yan, C.Yan, N.

(2021) Science 

  • DOI: 10.1126/science.abb2224
  • Primary Citation of Related Structures:  
    6M49

  • PubMed Abstract: 
  • The SREBP pathway controls cellular homeostasis of sterols. The key players in this pathway, Scap and Insig-1/2, are membrane-embedded sterol sensors. 25-hydroxycholesterol (25HC)-dependent association of Scap and Insigs acts as the master switch for the ...

    The SREBP pathway controls cellular homeostasis of sterols. The key players in this pathway, Scap and Insig-1/2, are membrane-embedded sterol sensors. 25-hydroxycholesterol (25HC)-dependent association of Scap and Insigs acts as the master switch for the SREBP pathway. Here, we present cryo-EM analysis of the human Scap and Insig-2 complex in the presence of 25HC, with the transmembrane (TM) domains determined at an average resolution of 3.7 Å. The sterol sensing domain (SSD) in Scap and all six TMs in Insig-2 were resolved. A 25HC molecule is sandwiched between the S4-S6 segments in Scap and TMs 3/4 in Insig-2 in the luminal leaflet of the membrane. Unwinding of the middle of the Scap-S4 segment is crucial for 25HC binding and Insig association.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. nyan@princeton.edu yancy2019@tsinghua.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Insulin-induced gene 2 protein A225Homo sapiensMutation(s): 3 
Gene Names: INSIG2
Find proteins for Q9Y5U4 (Homo sapiens)
Explore Q9Y5U4 
Go to UniProtKB:  Q9Y5U4
NIH Common Fund Data Resources
PHAROS:  Q9Y5U4
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Sterol regulatory element-binding protein cleavage-activating protein,Sterol regulatory element-binding protein cleavage-activating protein B572Homo sapiensMutation(s): 0 
Gene Names: SCAP
Find proteins for Q12770 (Homo sapiens)
Explore Q12770 
Go to UniProtKB:  Q12770
NIH Common Fund Data Resources
PHAROS:  Q12770
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HC3
Query on HC3

Download Ideal Coordinates CCD File 
A
25-HYDROXYCHOLESTEROL
C27 H46 O2
INBGSXNNRGWLJU-ZHHJOTBYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China--

Revision History 

  • Version 1.0: 2021-01-20
    Type: Initial release
  • Version 1.1: 2021-01-27
    Changes: Database references