Amino Acids: Threonine

THREONINE THR, T

CHEMICAL STRUCTURE

CHEMICAL SHIFTS

Standard chemical shifts of random extended chain structures:

¹H^a	¹³C^a	¹⁵N^b
NH: 8.24 HA: 4.35 HB: 4.22 HG: 1.23	CO: 172.7 CA: 60.2 CB: 68.3 CG: 20.0	N: 114.2

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

Easy spin system identification from:

HA-HB cross-peak in a COSY-DQF experiment.

Typical pattern in a TOCSY experiment.

SECONDARY STRUCTURE

Standard average chemical shift values used in determination of secondary structure by means of the CSI method:
HA: 4.35
CA: 62.0
CO: 175.5
Thus:
          HELIX           B STRAND          COIL
             CA      CO       CA      CO           CA      CO
            65.8    176.7     60.6    174.2      62.0    174.8
More info in: ¹³CA and ¹³CO chemical shifts according to secondary structure.

OBSERVATIONS

RELATED TOPICS