Words similar to substrate-binding
Example sentences for: substrate-binding
How can you use “substrate-binding” in a sentence? Here are some example sentences to help you improve your vocabulary:
In L1, the residue at position 224 is a serine [ 35 ] , and the substrate-binding model for L1 predicts that this serine residue interacts with the carboxylate on substrate via a water molecule [ 37 ] . To test the proposed role of Ser224 in L1, serine was changed to an alanine (S224A), aspartic acid (S224D), and lysine (S224K), and these mutants were characterized using metal analyses, CD spectroscopy, steady-state kinetics, and pre-steady state kinetic studies.
The lack of conserved motifs in the substrate-binding region is consistent with the comparison of the E. coli and human GshB structures, which shows remarkably little similarity in this region of the protein.
From an evolutionary perspective, the function of proteins within a protein family encompasses both variation, for example, substrate specificity reflected in amino acids lining substrate-binding pockets, and conservation, for example, regions responsible for general enzymatic activity or binding of a common molecular scaffold.
predicted that Phe158 and Ile 164 form hydrophobic interactions with bulky substituents on the substrate, suggesting that the loss of these residues would only affect binding of substrates with large aromatic substituents [ 37 ] . In the modeling studies on CcrA [ 42 ] , Asn233 was predicted to interact with the β-lactam carbonyl on substrate, and mutagenesis studies have supported this prediction [ 43 ] . Although Asn233 is sequence conserved in L1 [ 35 ] , it is located 14Å away from the modeled position of the β-lactam carbonyl and was predicted not to play a role in substrate binding to L1 [ 37 ] . On the other hand, the substrate-binding model predicted that Tyr228 was in position to offer a hydrogen bond to the β-lactam carbonyl and participate in an oxyanion hole that was proposed to form as the substrate was hydrolyzed [ 37 ] . By using the crystal structure and modeling studies on L1, Ullah et al.
The substrate-binding model showed that Tyr228 in L1 was position-conserved with Asn233 in the other crystallographically characterized metallo-β-lactamases [ 37 42 44 45 46 ] . Spencer and coworkers postulated that Tyr228 is part of an oxyanion hole that interacts with the β-lactam carbonyl on substrate and helps to stabilize the putative tetrahedral intermediate formed during substrate turnover [ 37 ] . To test this hypothesis, Tyr228 was changed to an alanine and to a phenylalanine to afford the Y228A and Y228F mutants, respectively.
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