Amino Acids: Difference between revisions
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==22 Standard Amino Acids and Mnemonics== | ==22 Standard Amino Acids and Mnemonics== | ||
Here are the names of the twenty-two standard amino acids, with their three and one-letter<ref>A one-letter notation for amino acid sequences (definitive rules). IUPAC—IUB Commission on Biochemical Nomenclature, pages 639-645, International Union of Pure and Applied Chemistry and International Union of Biochemistry, Butterworths, London, 1971. [ | Here are the names of the twenty-two standard amino acids, with their three and one-letter<ref>A one-letter notation for amino acid sequences (definitive rules). IUPAC—IUB Commission on Biochemical Nomenclature, pages 639-645, International Union of Pure and Applied Chemistry and International Union of Biochemistry, Butterworths, London, 1971. [https://old.iupac.org/publications/pac/1972/pdf/3104x0639.pdf Full Text].</ref> abbreviations. Mnemonic names are intended to help you to remember the one-letter codes, but are not the correct names. | ||
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† Asx: Asn or Asp; Glx: Gln or Glu; Unk: unknown. | † Asx: Asn or Asp; Glx: Gln or Glu; Unk: unknown. | ||
<br> | <br> | ||
[http:// | [http://old.iupac.org/publications/pac/1972/pdf/3104x0639.pdf IUPAC/IUB 1971 publication] defining one-letter codes. | ||
</center></td></tr> | </center></td></tr> | ||
</table> | </table> | ||
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==L- and D-Amino Acids== | ==L- and D-Amino Acids== | ||
<table border='1' cellpadding='3' align='right' hspace="8"><tr><td colspan='2'> | <table border='1' cellpadding='3' align='right' hspace="8" class="wikitable" style="margin:0px 0px 0px 8px;"><tr><td colspan='2'> | ||
PDB Nomenclature | PDB Nomenclature | ||
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</td></tr><tr><td> | </td></tr><tr><td> | ||
ALA<br>ARG<br>ASN<br>ASP<br>CYS<br>GLN<br>GLU<br>HIS<br>ILE<br>LEU<br>LYS<br>MET<br> | ALA<br>ARG<br>ASN<br>ASP<br>CYS<br>GLN<br>GLU<br>HIS<br>ILE<br>LEU<br>LYS<br>MET<br> | ||
PHE<br>PRO<br>SER<br>THR<br>TRP<br>TYR<br>VAL | PHE<br>PRO<br>PYL<br>SEC<br>SER<br>THR<br>TRP<br>TYR<br>VAL | ||
</td><td> | </td><td> | ||
DAL<br>DAR<br>DSG<br>DAS<br>DCY<br>DGN<br>DGL<br>DHI<br>DIL<br>DLE<br>DLY<br>MED<br> | DAL<br>DAR<br>DSG<br>DAS<br>DCY<br>DGN<br>DGL<br>DHI<br>DIL<br>DLE<br>DLY<br>MED<br> | ||
DPN<br>DPR<br>DSN<br>DTH<br>DTR<br>DTY<br>DVA | DPN<br>DPR<br>?<ref name="ddd">In January, 2022, no D-selenocysteine nor D-pyrrolysine were present in the [[wwPDB]], according to David Armstrong of PDBe.</ref><br>?<ref name="ddd" /><br>DSN<br>DTH<br>DTR<br>DTY<br>DVA | ||
</td></tr></table> | </td></tr></table> | ||
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===Selenocysteine: the 21st amino acid=== | ===Selenocysteine: the 21st amino acid=== | ||
Rare proteins in all domains of life include '''[[Selenocysteine|selenocysteine (Sec, U)]]''', designated the 21st amino acid<ref name='21st'>PMID: 11028985</ref>. | Rare proteins in all domains of life include '''[[Selenocysteine|selenocysteine (Sec, U)]]''', designated the 21st amino acid<ref name='21st'>PMID: 11028985</ref>. In 2024, over 90 entries in the [[PDB]] include selenocysteine, identified as SEC. | ||
===Pyrrolysine: the 22nd amino acid=== | ===Pyrrolysine: the 22nd amino acid=== | ||
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*[[Standard Residues]] | *[[Standard Residues]] | ||
*[http://en.wikipedia.org/wiki/Amino_acids Amino Acids in Wikipedia] | *[http://en.wikipedia.org/wiki/Amino_acids Amino Acids in Wikipedia] | ||
*[[Basics of Protein Structure]] | |||
==References== | ==References== | ||
<references /> | <references /> | ||