8SH7

TUBB4B and TUBA1A Heterodimer from Human Respiratory Doublet Microtubules

• PDB DOI: https://doi.org/10.2210/pdb8SH7/pdb
• EM Map EMD-40480: EMDB EMDataResource

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2023-04-13 Released: 2024-05-01 
• Deposition Author(s): Anderson, J.R., Gui, M., Brown, A.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), The Pew Charitable Trusts

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.80 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

Literature

TUBB4B variants specifically impact ciliary function, causing a ciliopathic spectrum

Anderson, J.R., Gui, M., Brown, A.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 101.06 kDa 
• Atom Count: 6,819 
• Modelled Residue Count: 862 
• Deposited Residue Count: 896 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin alpha-1A chain	A	451	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q71U36 (Homo sapiens) Explore Q71U36  Go to UniProtKB:  Q71U36
PHAROS:  Q71U36 GTEx:  ENSG00000167552

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin beta-4B chain	B	445	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P68371 (Homo sapiens) Explore P68371  Go to UniProtKB:  P68371
PHAROS:  P68371 GTEx:  ENSG00000188229

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GTP (Subject of Investigation/LOI)	C [auth A]	GUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O14 P3 XKMLYUALXHKNFT-UUOKFMHZSA-N
GDP (Subject of Investigation/LOI)	E [auth B]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG (Subject of Investigation/LOI)	D [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.80 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-05-01 
Deposition Author(s): Anderson, J.R., Gui, M., Brown, A.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	5R01GM141109
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	5F30HL162128
The Pew Charitable Trusts	United States	--

Revision History  

• Version 1.0: 2024-05-01
  Type: Initial release