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5' tail
6%
13/214
Dihydrouracil arm
12/214
Thymidine t-arm
8%
17/214
Anticodon
4%
9/214
CCA tail
74%
159/214
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This patient's clinical presentation is consistent with lyme disease. tRNA is covalently bound to amino acids at the 3' CCA tail. Translation from mRNA to proteins is accomplished using tRNA molecules, which act as carriers of individual amino acids. A "loaded" tRNA molecule is covalently linked to an amino acid at the 3' CCA tail, and contains a specific anticodon sequence between the D and T loops. This anticodon sequence allows the tRNA to be targeted to the correct location, such that specific mRNA sequences produce specific amino acid additions. Colussi et al. published a crystal structure of an unusual tRNA-like structure that is found in the turnip yellow mosaic virus. They note that the structure has two structural areas: one that is similar to a typical tRNA, and functions as expected as an aminoacyl transferase, and a second conformation that allows the tRNA to act as a promoter. Figure A shows the bulls-eye rash of lyme disease. Illustration A shows an aminoacyl-tRNA molecule bound to an mRNA strand. Illustration B depicts the process of translation from mRNA into proteins. Incorrect Answers: Answers 1-3: The specific function of these regions is not known. Answer 4: This region facilitates correct tRNA binding to the mRNA sequence.
4.6
(5)
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