Sandbox Reserved 192

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=="'Structure'''==
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=='''Structure'''==
RNase A is made up of a single polypeptide chain of 124 residues. Of the 20 natural amino acids, RNase A possesses 19 of them, excluding tryptophan. This single polypeptide chain is cross-linked internally by four disulfide linkages, which contribute to the stability of RNase A. RNase A is in the shape of a kidney, with the active-site residues located within the cleft of the kidney. Active site residues and focus on it?? A long four-stranded anti-parallel ß-sheet and three short α-helices make up the secondary structure of RNase A. The amino acid sequence determines the three-dimensional structure of RNase A based on side-chain interactions.
RNase A is made up of a single polypeptide chain of 124 residues. Of the 20 natural amino acids, RNase A possesses 19 of them, excluding tryptophan. This single polypeptide chain is cross-linked internally by four disulfide linkages, which contribute to the stability of RNase A. RNase A is in the shape of a kidney, with the active-site residues located within the cleft of the kidney. Active site residues and focus on it?? A long four-stranded anti-parallel ß-sheet and three short α-helices make up the secondary structure of RNase A. The amino acid sequence determines the three-dimensional structure of RNase A based on side-chain interactions.
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Revision as of 04:07, 29 March 2011

This Sandbox is Reserved from Feb 02, 2011, through Jul 31, 2011 for use by the Biochemistry II class at the Butler University at Indianapolis, IN USA taught by R. Jeremy Johnson. This reservation includes Sandbox Reserved 191 through Sandbox Reserved 200.
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Introduction

Ribonucleases or RNA depolymerases are ribosomes that catalyze RNA degradation in cells. They are most commonly found in the pancreas because they digest large amounts of RNA excreted by the stomach. The pancreas in ruminants, such as cows, have especially high amounts of ribonucleases in order to process nutrients from cellulose. One such ribonuclease, ribonuclease A or RNase A from cows, has been thoroughly studied due to its prevalence and structure.

Figure 1. This figure shows the three dimensional structure of RNase A

Drag the structure with the mouse to rotate


Structure

RNase A is made up of a single polypeptide chain of 124 residues. Of the 20 natural amino acids, RNase A possesses 19 of them, excluding tryptophan. This single polypeptide chain is cross-linked internally by four disulfide linkages, which contribute to the stability of RNase A. RNase A is in the shape of a kidney, with the active-site residues located within the cleft of the kidney. Active site residues and focus on it?? A long four-stranded anti-parallel ß-sheet and three short α-helices make up the secondary structure of RNase A. The amino acid sequence determines the three-dimensional structure of RNase A based on side-chain interactions.

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