Amino Acids: Arginine

ARGININE ARG, R

CHEMICAL STRUCTURE

CHEMICAL SHIFTS

Standard chemical shifts of random extended chain structures:

¹H^a	¹³C^a	¹⁵N^b
NH: 8.27 HA: 4.38 HB: 1.89, 1.79 HG: 1.70 HD: 3.32 NH: 7.17, 6.62	CO: 175.0 CA: 54.6 CB: 28.8 CG: 25.7 CD: 41.7 CH: 157.6	N: 120.8

a) from 86BOOK1: b) from 91JMB311-222

More info in:

¹H chemical shifts of amino acids

¹³C chemical shifts of amino acids

Average ¹HA, ¹HN and ¹⁵N chemical shifts in random coil

IDENTIFICATION

Typical NH-CH-CH₂-CH₂-CH₂ cross-peaks in COSY-DQF experiment and TOCSY experiments.

See list of NMR experiments for sequence-specific assignment of arginine-guanidino spin systems in ¹³C,¹⁵N-labeled proteins dissolved in H₂O

SECONDARY STRUCTURE

Standard average chemical shift values used in determination of secondary structure by means of the CSI method:
HA: 4.38
CA: 56.0
CO: 176.6
Thus:
          HELIX           B STRAND          COIL
             CA      CO       CA      CO           CA      CO
            59.4    179.1     54.8    175.0      56.7    176.6
More info in: ¹³CA and ¹³CO chemical shifts according to secondary structure.

OBSERVATIONS

RELATED TOPICS