ISDA: 2XOI

Deposition Date 2010-08-17

Release Date 2011-01-19

Last Version Date 2024-11-06

Entry Detail

PDB ID:

2XOI

Keywords:

HYDROLASE

Title:

Functional and Structural Analyses of N-Acylsulfonamide-Linked Dinucleoside Inhibitors of Ribonuclease A

Biological Source:

Source Organism:

BOS TAURUS (Taxon ID: 9913)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.72 Å

R-Value Free:

0.24

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

C 1 2 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:RIBONUCLEASE PANCREATIC
Gene (Uniprot):RNASE1
Chain IDs:A, B
Chain Length:124
Number of Molecules:2
Biological Source:BOS TAURUS

UniProt ID:P61823 Pfam ID:PF00074 EC:4.6.1.18

Ligand Molecules

SFB

Primary Citation

Functional and Structural Analyses of N-Acylsulfonamide-Linked Dinucleoside Inhibitors of Ribonuclease A.

Thiyagarajan, N, Smith, B.D, Raines, R.T, Ravi Acharya, K.Show

FEBS J. 278 541 ? (2011)

PMID: 21205197 DOI: 10.1111/J.1742-4658.2010.07976.X

Abstact

Molecular probes are useful for both studying and controlling the functions of enzymes and other proteins. The most useful probes have high affinity for their target, along with small size and resistance to degradation. Here, we report on new surrogates for nucleic acids that fulfill these criteria. Isosteres in which phosphoryl [R-O-P(O(2)(-))-O-R'] groups are replaced with N-acylsulfonamidyl [R-C(O)-N(-)-S(O(2))-R'] or sulfonimidyl [R-S(O(2))-N(-)-S(O(2))-R'] groups increase the number of nonbridging oxygens from two (phosphoryl) to three (N-acylsulfonamidyl) or four (sulfonimidyl). Six such isosteres were found to be more potent inhibitors of catalysis by bovine pancreatic RNase A than are parent compounds containing phosphoryl groups. The atomic structures of two RNase A·N-acylsulfonamide complexes were determined at high resolution by X-ray crystallography. The N-acylsulfonamidyl groups were observed to form more hydrogen bonds with active site residues than did the phosphoryl groups in analogous complexes. These data encourage the further development and use of N-acylsulfonamides and sulfonimides as antagonists of nucleic acid-binding proteins.

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