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Hello! colleagues
I am now bothered by a problem of heavy atom sites.
I have native data 2.0A and two derivatives datas. Derivative_1 data is 2.5A
and it was soaked by Na2WO4 .Derivative_2 data is 3.0A and it was soaked by K2PtI6.
We know this protein's sequence, it contains 124 aa. Its spacegroup maybe P43212 or
P41212.
I calculate difference patterson map of derivative_1 by FFT program. After that,
I searched for derivative_1 heavy atom site by RSPS program of ccp4 Suite. The
results are as following:
POSNN FRACTIONAL COORDINATES ANGSTROM COORDINATES SCORE SITE
----- ------------------------ ------------------------ --------- ----
1 0.3164 0.0508 0.1172 16.87 2.71 23.38 3.44 1
2 0.1836 0.4492 0.1172 9.79 23.95 23.38 3.44 1
3 0.8164 0.5508 0.1172 43.53 29.37 23.38 3.44 1
4 0.6836 0.9492 0.1172 36.45 50.61 23.38 3.44 1
5 0.8242 0.4453 0.1191 43.94 23.74 23.77 2.48 2
6 0.1758 0.5547 0.1191 9.37 29.57 23.77 2.48 2
7 0.6758 0.0547 0.1191 36.03 2.92 23.77 2.48 2
8 0.3242 0.9453 0.1191 17.29 50.40 23.77 2.48 2
9 0.6289 0.6289 0.0098 33.53 33.53 1.95 2.34 3
The first four peak are equivalent in intensity, I don't know which one is correct.