Spacegroup Frequencies
From: Gerard Kleijwegt a.k.a. gerard@xray.bmc.uu.se
May 1994.
Spacegroup frequencies from the latest PDB release.
Only 60 spacegroups were encountered. Note that
the first SIX spacegroups account for almost 2/3
of the total ! (Note: this list includes all
XRAY entries, i.e. including DNA structures and
more than 100 lysozyme entries !)
| Spacegroup symbol | # seen | % |
| P212121 | 483 | 24.150 |
| P21 | 276 | 13.800 |
| P3221 | 209 | 10.450 |
| C2 | 122 | 6.100 |
| P43212 | 107 | 5.350 |
| P3121 | 96 | 4.800 |
| P21212 | 69 | 3.450 |
| C2221 | 59 | 2.950 |
| P41212 | 57 | 2.850 |
| P1 | 56 | 2.800 |
| I222 | 42 | 2.100 |
| P6122 | 34 | 1.700 |
| P42212 | 30 | 1.500 |
| P61 | 29 | 1.450 |
| B2 | 27 | 1.350 |
| P6 | 24 | 1.200 |
| P321 | 22 | 1.100 |
| P41 | 22 | 1.100 |
| R3 | 21 | 1.050 |
| P213 | 19 | 0.950 |
| R32 | 16 | 0.800 |
| P32 | 15 | 0.750 |
| P43 | 15 | 0.750 |
| P6522 | 14 | 0.700 |
| P63 | 11 | 0.550 |
| I422 | 9 | 0.450 |
| P6322 | 8 | 0.400 |
| P65 | 8 | 0.400 |
| I4 | 7 | 0.350 |
| F432 | 7 | 0.350 |
| P6422 | 7 | 0.350 |
| P21221 | 6 | 0.300 |
| I213 | 6 | 0.300 |
| I23 | 5 | 0.250 |
| I21 | 5 | 0.250 |
| P4212 | 5 | 0.250 |
| I432 | 5 | 0.250 |
| P42 | 5 | 0.250 |
| P31 | 4 | 0.200 |
| P4 | 4 | 0.200 |
| P22121 | 3 | 0.150 |
| P3212 | 3 | 0.150 |
| I4122 | 3 | 0.150 |
| P6222 | 3 | 0.150 |
| F422 | 2 | 0.100 |
| C4212 | 2 | 0.100 |
| I4132 | 2 | 0.100 |
| P4132 | 2 | 0.100 |
| P4322 | 2 | 0.100 |
| P622 | 2 | 0.100 |
| P1121 | 1 | 0.050 |
| P2 | 1 | 0.050 |
| A2 | 1 | 0.050 |
| I2 | 1 | 0.050 |
| B2212 | 1 | 0.050 |
| C21 | 1 | 0.050 |
| I212121 | 1 | 0.050 |
| P3 | 1 | 0.050 |
| P3112 | 1 | 0.050 |
| P422 | 1 | 0.050 |
Nr of X-RAY PDB entries : ( 2000)
Nr of spacegroups found : ( 60)
Total nr of Primitive spacegroups: 1655 (82.75 %)
I 86 ( 4.30 %)
C 184 ( 9.20 %)
A 1 ( 0.05 %)
B 28 ( 1.40 %)
F 9 ( 0.45 %)
Trigonal spacegroups: 388 (19.40 %)
Tetragonal 287 (14.35 %)
Hexagonal 140 ( 7.00 %)
Rhombohedral 37 ( 1.85 %)