7MHY

Human Hedgehog acyltransferase (HHAT) in complex with palmitoyl-CoA and two Fab antibody fragments


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Substrate and product complexes reveal mechanisms of Hedgehog acylation by HHAT.

Jiang, Y.Benz, T.L.Long, S.B.

(2021) Science 372: 1215-1219

  • DOI: 10.1126/science.abg4998
  • Primary Citation of Related Structures:  
    7MHY, 7MHZ

  • PubMed Abstract: 
  • Hedgehog proteins govern crucial developmental steps in animals and drive certain human cancers. Before they can function as signaling molecules, Hedgehog precursor proteins must undergo amino-terminal palmitoylation by Hedgehog acyltransferase (HHAT). We present cryo-electron microscopy structures of human HHAT in complex with its palmitoyl-coenzyme A substrate and of a product complex with a palmitoylated Hedgehog peptide at resolutions of 2 ...

    Hedgehog proteins govern crucial developmental steps in animals and drive certain human cancers. Before they can function as signaling molecules, Hedgehog precursor proteins must undergo amino-terminal palmitoylation by Hedgehog acyltransferase (HHAT). We present cryo-electron microscopy structures of human HHAT in complex with its palmitoyl-coenzyme A substrate and of a product complex with a palmitoylated Hedgehog peptide at resolutions of 2.7 and 3.2 angstroms, respectively. The structures reveal how HHAT overcomes the challenges of bringing together substrates that have different physiochemical properties from opposite sides of the endoplasmic reticulum membrane within a membrane-embedded active site for catalysis. These principles are relevant to related enzymes that catalyze the acylation of Wnt and of the appetite-stimulating hormone ghrelin. The structural and mechanistic insights may advance the development of inhibitors for cancer.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. longs@mskcc.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein-cysteine N-palmitoyltransferase HHATA493Homo sapiensMutation(s): 0 
Gene Names: HHATMART2SKI1
EC: 2.3.1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q5VTY9 (Homo sapiens)
Explore Q5VTY9 
Go to UniProtKB:  Q5VTY9
PHAROS:  Q5VTY9
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
1C06 Fab heavy chainB [auth M]211Mus musculusMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
1C06 Fab light chainC [auth N]207Mus musculusMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
3H02 Fab heavy chainD [auth O]211Mus musculusMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
3H02 Fab light chainE [auth P]207Mus musculusMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AJP (Subject of Investigation/LOI)
Query on AJP

Download Ideal Coordinates CCD File 
J [auth A] , K [auth A] , L [auth A] , M [auth A] , N [auth A] , O [auth A] , P [auth A] , Q [auth A] , 
J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A], S [auth A], T [auth A], U [auth A], V [auth A], W [auth A]
Digitonin
C56 H92 O29
UVYVLBIGDKGWPX-KUAJCENISA-N
 Ligand Interaction
PKZ (Subject of Investigation/LOI)
Query on PKZ

Download Ideal Coordinates CCD File 
G [auth A], H [auth A], I [auth A]Palmitoyl-CoA
C37 H66 N7 O17 P3 S
MNBKLUUYKPBKDU-BBECNAHFSA-N
 Ligand Interaction
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
F [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2021-04-16 
  • Released Date: 2021-06-16 
  • Deposition Author(s): Long, S.B., Jiang, Y.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM131921
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesP30CA008748

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-16
    Type: Initial release
  • Version 1.1: 2021-07-14
    Changes: Database references
  • Version 2.0: 2021-08-25
    Changes: Advisory, Atomic model, Data collection, Database references