1)
2) If the total enzyme concentration was 9 nmol/Lnmol/L, how many molecules of substrate can a molecule of enzyme process in each minute?
Express your answer to three significant figures.
3) The kcat for neuraminidase at pH=6.15pH=6.15, 37 ∘C∘C is 26.8 s−1s−1. Calculate KMKM for the hydrolysis of sialic acid.
Express your answer with the appropriate units.
Homework Answers
Add Answer to:
1)
2) If the total enzyme concentration was 9 nmol/Lnmol/L, how
many molecules of substrate can...
Part A An enzyme that follows Michaelis-Menten kinetics has a KM value of 10.0 uM and...
Part A An enzyme that follows Michaelis-Menten kinetics has a KM value of 10.0 uM and a kcat value of 201 s-1. At an initial enzyme concentration of 0.0100 uM, the initial reaction velocity was found to be 1.07 x 10- uM/s. What was the initial concentration of the substrate, [S], used in the reaction ? Express your answer in micromolar to three significant figures. ► View Available Hint(s) PO ALO O O ? [S]; = MM UM
In kinetics experiments, the hydrolysis of the substrate sialic acid by neuraminidase appears to obey Michaelis–Menten...
In kinetics experiments, the hydrolysis of the substrate sialic acid by neuraminidase appears to obey Michaelis–Menten kinetics. Neuraminidase activity is critical for viral infectivity; thus, this enzyme is the target of much work by pharmaceutical companies to develop a drug to treat influenza virus infection. The drug “Tamiflu” is a competitive inhibitor of neuraminidase. Initial rate data collected at pH=6.15, 37 ∘C with 0.021 μM neuraminidase and 25.0 μM sialic acid gives a Lineweaver–Burk plot with a slope of 51.2...
To determine the kinetic characteristics of an enzyme you used 1 nmol/L of enzyme in a...
To determine the kinetic characteristics of an enzyme you used 1 nmol/L of enzyme in a series of assays where you measured the rate of reactions as you varied the concentration of substrate in each assay (Table A). Estimate from a Michaelis-Menten plot approximate values for Vmax, KM, Kcat, and the specificity constant for this enzyme and substrate. (The only information that is given is this paragraph and the table below). Table 1: [S] (μM) v (μmol/L/min) 0 0 5...
A single-substrate enzyme that obeys Michaelis-Menten kinetics displays the following parameters: Kd = 3.1 x 10^-5...
A single-substrate enzyme that obeys Michaelis-Menten kinetics displays the following parameters: Kd = 3.1 x 10^-5 M; k1 = 107 M-1 s-1, and kcat = 10^4 s-1. Given this information, what is the value of the Michaelis constant Km? Express your answer in terms of mM to four significant figures.
Consider the enzyme-catalyzed reaction with Vmax=164 (μmol/L)min−1 and KM=32μmol/L. Part A If the total enzyme concentration...
Consider the enzyme-catalyzed reaction with Vmax=164 (μmol/L)min−1 and KM=32μmol/L. Part A If the total enzyme concentration was 6 nmol/L, how many molecules of substrate can a molecule of enzyme process in each minute? Express your answer to three significant figures. kcat kcat = 2.73×104 min−1 Part B Calculate kcat/KM for the enzyme reaction.
An enzyme that follows Michaelis-Menten kinetics has a initial velocity of 300 nM/s at a substrate...
An enzyme that follows Michaelis-Menten kinetics has a initial velocity of 300 nM/s at a substrate concentration of 30 uM. The maximum velocity of 400 nM/sec. What is the Km for this enzyme in uM? (Give your answer as a number only. Type your response
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate A, she determined 30 min that Km 3.0 HM and kcat Jessica graduated and her project has been passed on to you. Unfortunately, Jessica was so busy that she sometimes forgot to record all of the details of an assay in her lab notebook. Your mentor suggests that you try to back calculate some of the missing concentration values. Assume that the enzyme follows...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A↽−−⇀B. For substrate A,...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A↽−−⇀B. For substrate A, she determined that ?m=2.5 μM and ?cat=35 min−1. Jessica graduated and her project has been passed on to you. Unfortunately, Jessica was so busy that she sometimes forgot to record all of the details of an assay in her lab notebook. Your mentor suggests that you try to back calculate some of the missing concentration values. Assume that the enzyme follows Michaelis–Menten kinetics. 1)...
help with these please The turnover number is defined as the maximum number of substrate molecules...
help with these please
The turnover number is defined as the maximum number of substrate molecules that can be converted into product molecules per unit time by an enzyme molecule. The concentration of enzyme active sites is not necessarily equal to the concentration of enzyme molecules, because some enzyme molecules have more than one active site. If the enzyme molecule has one active site, the turnover number is given by turnover number = - -=k2 (Rmax is often written as...
1. The kinetics of an enzyme was examined at various substrate concentrations in both the presence...
1. The kinetics of an enzyme was examined at various substrate concentrations in both the presence and absence of 3 mM inhibitor Z. The initial velocity data obtained are shown below: [S] (mmoles liter) v (mmoles"litermin) no inhibitor inhibitor Z 1.25 1.67 2.50 5.00 10.0 1.72 2.04 2.63 3.33 4.17 0.98 1.17 1.47 1.96 2.38 (4 pts) Estimat e Vmax and Kw in the presence and absence of inhibitor using the Michaelis Menton curve-fitting program on Kaleidagraph (see lab manual)....
Part A An enzyme that follows Michaelis-Menten kinetics has a KM value of 10.0 uM and a kcat value of 201 s-1. At an initial enzyme concentration of 0.0100 uM, the initial reaction velocity was found to be 1.07 x 10- uM/s. What was the initial concentration of the substrate, [S], used in the reaction ? Express your answer in micromolar to three significant figures. ► View Available Hint(s) PO ALO O O ? [S]; = MM UM
An enzyme that follows Michaelis-Menten kinetics has a initial velocity of 300 nM/s at a substrate concentration of 30 uM. The maximum velocity of 400 nM/sec. What is the Km for this enzyme in uM? (Give your answer as a number only. Type your response
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate A, she determined 30 min that Km 3.0 HM and kcat Jessica graduated and her project has been passed on to you. Unfortunately, Jessica was so busy that she sometimes forgot to record all of the details of an assay in her lab notebook. Your mentor suggests that you try to back calculate some of the missing concentration values. Assume that the enzyme follows...
help with these please
The turnover number is defined as the maximum number of substrate molecules that can be converted into product molecules per unit time by an enzyme molecule. The concentration of enzyme active sites is not necessarily equal to the concentration of enzyme molecules, because some enzyme molecules have more than one active site. If the enzyme molecule has one active site, the turnover number is given by turnover number = - -=k2 (Rmax is often written as...
1. The kinetics of an enzyme was examined at various substrate concentrations in both the presence and absence of 3 mM inhibitor Z. The initial velocity data obtained are shown below: [S] (mmoles liter) v (mmoles"litermin) no inhibitor inhibitor Z 1.25 1.67 2.50 5.00 10.0 1.72 2.04 2.63 3.33 4.17 0.98 1.17 1.47 1.96 2.38 (4 pts) Estimat e Vmax and Kw in the presence and absence of inhibitor using the Michaelis Menton curve-fitting program on Kaleidagraph (see lab manual)....
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