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Dušikova baza

Parovi baza kod RNK-u: nukleobaze su u plavoj boji, a vodikove su veze crvene.

Dušikova baza (dušična baza, nukleobaza) jest dio DNK ili RNK koji može sudjelovati u spajanju.[1] Primarne dušikove baze jesu citozin, gvanin, adenin (ove su tri prisutne i u DNK-u i u RNK-u), timin (samo DNK) i uracil (samo RNK), a u skraćenome se obliku zapisuju C, G, A, T, i U.

Obično se jednostavno zovu baze u genetici. S obzirom na to da se A, G, C i T javljaju u DNK-u, te se molekule zovu DNK-baze; A, G, C, i U stoga se nazivaju RNK-baze.

Strukture

  • Kostur adenina i gvanina jest purin, one su stoga purinske baze.
  • Kostur citozina, uracila, i timina jest pirimidin, one su pirimidinske baze.

Primarne baze

Ove su baze sjedinjene u rastući lanac tijekom RNK i/ili DNK sinteze.

Dušikova baza Chemical structure of adenine
adenin
Chemical structure of guanine
gvanin
Chemical structure of thymine
timin
Chemical structure of cytosine
citozin
Chemical structure of uracil
uracil
Nukleozid Chemical structure of adenosine
adenozin
A
Chemical structure of guanosine
gvanozin
G
Chemical structure of thymidine
timidin
T
Chemical structure of cytidine
citidin
C
Chemical structure of uridine
uridin
U

Modificirane purinske baze

Ovo su primjeri modificiranoga adenozina ili gvanozina.

Dušikova baza Chemical structure of hypoxanthine
Hipoksantin
Chemical structure of xanthine
Ksantin
Chemical structure of 7-methylguanine
7-Metilgvanin
Nukleozid Chemical structure of inosine
Inozin
I
Chemical structure of xanthosine
Ksantozin
X
Chemical structure of 7-methylguanosine
7-Metilgvanozin
m7G

Modificirane pirimidinske baze

Ovo su primjeri modificiranih citidina, timidina ili uridina.

Dušikova baza Chemical structure of dihydrouracil
5,6-dihidrouracil
Chemical structure of 5-methylcytosine
5-metilcitozin
Nukleozid Chemical structure of dihydrouridine
dihidrouridin
D
Chemical structure of 5-methylcytidine
5-metilcitidin
m5C

Povezani članci

Izvori

  1. Darinka Koraćević, Gordana Bjelaković, Vidosava Đorđević. Biohemija. savremena administracija. ISBN 86-387-0622-7CS1 održavanje: više imena: authors list (link)

Literatura

  • Darinka Koraćević, Gordana Bjelaković, Vidosava Đorđević. Biohemija. savremena administracija. ISBN 86-387-0622-7CS1 održavanje: više imena: authors list (link)

Vanjske poveznice

Nedovršeni članak Dušikova baza koji govori o biologiji treba dopuniti. Dopunite ga prema pravilima Wikipedije.
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Dušikova baza
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