6URL

Barrier-to-autointegration factor soaked in isopropanol: 1 of 14 in MSCS set

Summary for 6URL

• Entry DOI: 10.2210/pdb6url/pdb
• Related: 6UNT 6URE 6URJ 6URK
• Descriptor: Barrier-to-autointegration factor, ETHANOL (3 entities in total)
• Functional Keywords: alpha helical, mscs, minor groove binder, dna binding protein
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 2
• Total formula weight: 20239.31

Authors

Agarwal, S.,Smith, M.,De La Rosa, I.,Kliment, A.V.,Swartz, P.,Segura-Totten, M.,Mattos, C. (deposition date: 2019-10-23, release date: 2020-10-07, Last modification date: 2024-03-13)

Primary citation

Agarwal, S.,Smith, M.,De La Rosa, I.,Verba, K.A.,Swartz, P.,Segura-Totten, M.,Mattos, C.
Development of a structure-analysis pipeline using multiple-solvent crystal structures of barrier-to-autointegration factor.
Acta Crystallogr D Struct Biol, 76:1001-1014, 2020

PubMed Abstract: The multiple-solvent crystal structure (MSCS) approach uses high concentrations of organic solvents to characterize the interactions and effects of solvents on proteins. Here, the method has been further developed and an MSCS data-handling pipeline is presented that uses the Detection of Related Solvent Positions (DRoP) program to improve data quality. DRoP is used to selectively model conserved water molecules, so that an advanced stage of structural refinement is reached quickly. This allows the placement of organic molecules more accurately and convergence on high-quality maps and structures. This pipeline was applied to the chromatin-associated protein barrier-to-autointegration factor (BAF), resulting in structural models with better than average statistics. DRoP and Phenix Structure Comparison were used to characterize the data sets and to identify a binding site that overlaps with the interaction site of BAF with emerin. The conserved water-mediated networks identified by DRoP suggested a mechanism by which water molecules are used to drive the binding of DNA. Normalized and differential B-factor analysis is shown to be a valuable tool to characterize the effects of specific solvents on defined regions of BAF. Specific solvents are identified that cause stabilization of functionally important regions of the protein. This work presents tools and a standardized approach for the analysis and comprehension of MSCS data sets.

PubMed: 33021502
DOI: 10.1107/S2059798320011341

Experimental method

X-RAY DIFFRACTION (1.72 Å)