Selenocysteine: Difference between revisions
Jump to navigation
Jump to search
Eric Martz (talk | contribs) adding content |
Eric Martz (talk | contribs) adding content |
||
| Line 6: | Line 6: | ||
==Structure and Synthesis== | ==Structure and Synthesis== | ||
Cysteine (Cys) has a sulfur-containing side chain '''-CH<sub>2</sub>-SH''. In selenocysteine, the sulfur is replaced with selenium, making the side chain''' -CH<sub>2</sub>-SeH'''. | Cysteine (Cys) has a sulfur-containing side chain '''-CH<sub>2</sub>-SH'''. In selenocysteine, the sulfur is replaced with selenium, making the side chain''' -CH<sub>2</sub>-SeH'''. | ||
Sec differs from the [[Amino Acids|20 standard amino acids]] because, in all domains of life, it lacks its own tRNA synthetase, and is synthesized from Ser covalently linked to tRNA<sup>Sec</sup>. | Sec differs from the [[Amino Acids|20 standard amino acids]] because, in all domains of life, it lacks its own tRNA synthetase, and is synthesized from Ser covalently linked to tRNA<sup>Sec</sup>. | ||