Macromolecule Content

• Total Structure Weight: 15.54 kDa 
• Atom Count: 1090 
• Modelled Residue Count: 129 
• Deposited Residue Count: 129 
• Unique protein chains: 2

1JM4

NMR Structure of P/CAF Bromodomain in Complex with HIV-1 Tat Peptide

• DOI: 10.2210/pdb1JM4/pdb
• BMRB: 4312

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2001-07-17 Released: 2002-07-17 
• Deposition Author(s): Mujtaba, S., He, Y., Zeng, L., Farooq, A., Carlson, J.E., Ott, M., Verdin, E., Zhou, M.-M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 25 
• Selection Criteria: Back Calculated Data Agree with Experimental NOESY Spectrum, Structures with Acceptable Covalent Geometry, Structures with Favorable Non-bond Energy, Structures with the Least Restraint Violations, Structures with the Lowest Energy 

Literature

Structural basis of lysine-acetylated HIV-1 Tat recognition by PCAF bromodomain

Mujtaba, S., He, Y., Zeng, L., Farooq, A., Carlson, J.E., Ott, M., Verdin, E., Zhou, M.-M.

(2002) Mol Cell 9: 575-586

• PubMed: 11931765 
• DOI: 10.1016/s1097-2765(02)00483-5
• Primary Citation of Related Structures:  
  1JM4


• PubMed Abstract: 
  

The human immunodeficiency virus type 1 (HIV-1) trans-activator protein Tat stimulates transcription of the integrated HIV-1 genome and promotes viral replication in infected cells. Tat transactivation activity is dependent on lysine acetylation and its association with nuclear histone acetyltransferases p300/CBP (CREB binding protein) and p300/CBP-associated factor (PCAF). Here, we show that the bromodomain of PCAF binds specifically to HIV-1 Tat acetylated at lysine 50 and that this interaction competes effectively against HIV-1 TAR RNA binding to the lysine-acetylated Tat. The three-dimensional solution structure of the PCAF bromodomain in complex with a lysine 50-acetylated Tat peptide together with biochemical analyses provides the structural basis for the specificity of this molecular recognition and reveals insights into the differences in ligand selectivity of bromodomains.

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Related Citations: 

• Structure and Ligand of a Histone Acetyltransferase Bromodomain
  Dhalluin, C., Carlson, J.E., Zeng, L., He, C., Aggarwal, A.K., Zhou, M.-M.
  (1999) Nature 399: 491

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Organizational Affiliation: 

Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York University, New York, NY 10029, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HIV-1 Tat Peptide	A	11	N/A	Mutation(s): 0
Find proteins for P04610 (Human immunodeficiency virus type 1 group M subtype B (isolate BRU/LAI)) Explore P04610  Go to UniProtKB:  P04610

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
P300/CBP-associated Factor	B	118	Homo sapiens	Mutation(s): 0  Gene Names: KAT2B, PCAF EC: 2.3.1.48 (UniProt), 2.3.1.57 (UniProt)
Find proteins for Q92831 (Homo sapiens) Explore Q92831  Go to UniProtKB:  Q92831
NIH Common Fund Data Resources
PHAROS:  Q92831 GTEx:  ENSG00000114166

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
ALY	A	L-PEPTIDE LINKING	C8 H16 N2 O3		LYS

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 25 
• Selection Criteria: Back Calculated Data Agree with Experimental NOESY Spectrum, Structures with Acceptable Covalent Geometry, Structures with Favorable Non-bond Energy, Structures with the Least Restraint Violations, Structures with the Lowest Energy 
• OLDERADO: 1JM4 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-07-17 
• Released Date: 2002-07-17 
Deposition Author(s): Mujtaba, S., He, Y., Zeng, L., Farooq, A., Carlson, J.E., Ott, M., Verdin, E., Zhou, M.-M.

Revision History  

• Version 1.0: 2002-07-17
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance