MetaCyc Compound Class: a nucleobase

Synonyms: a nucleotide base, a nitrogenous base

Superclasses: a nucleic acid component
an organic heterocyclic compound an organonitrogen heterocyclic compound

Nucleobases are the parts of nucleic acids (DNA and RNA) that are involved in pairing of the two strands. The primary nucleobases are cytosine, guanine, adenine (found in both DNA and RNA), thymine (found only in DNA) and uracil (found only in RNA), abbreviated as C, G, A, T, and U, respectively. There are many additional nucleobases, usually derived from the primary ones.

Based on their structure, nucleobases are divided into purines and pyrimidines.

Child Classes: a 7-deazapurine base (2) , a modified nucleobase (14) , a nucleobase within a nucleic acid (0) , a purine base (4) , a pyrimidine base (3)

Unification Links: Wikipedia:Nucleobase

In Reactions of unknown directionality:

Not in pathways:
a 2-deoxy-D-ribosyl-base(1) + a base(2) = a 2-deoxy-D-ribosyl-base(2) + a base(1)
a D-ribosyl-base(1) + a base(2) = a D-ribosyl-base(2) + a base(1)

Revised 20-Aug-2010 by Caspi R , SRI International

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by SRI International Pathway Tools version 19.0 on Mon Jul 27, 2015, BIOCYC13A.