Hi,

On Thu, Jun 16, 2011 at 7:49 AM, Jan Dohnalek <dohnalek...@gmail.com> wrote:

>
> Modeling more UNKNOWN atoms might be the future for these cases?
>

one needs to specify chemical element type in 77-78 position, otherwise
these records are useless. Example:

http://www.rcsb.org/pdb/files/3GR4.pdb

HETATM15389 UNK  UNX A 532     -18.118  17.844   4.079  0.01  2.00           X
HETATM15390 UNK  UNX A 533      -8.272  -3.498  -6.221  0.01  2.00           X
HETATM15391 UNK  UNX A 534     -25.115  16.818   6.611  0.01  2.00           X
HETATM15392 UNK  UNX A 535      -6.573   1.578  13.603  0.01  2.00           X
HETATM15393 UNK  UNX A 536     -33.370   1.951  -7.370  0.01  2.00           X
HETATM15394 UNK  UNX A 537     -10.543  13.880  25.677  0.01  2.00           X

or another one:

http://www.rcsb.org/pdb/files/1au9.pdb

HETATM 1951 UNK  UNX A 277      -4.504  49.776  37.073  1.00 16.17           X
HETATM 1952 UNK  UNX A 278      -4.010  50.094  38.754  0.25 15.17           X

I'm puzzled about how occupancy and B were defined?

There is no element X, so these "atoms" can't be used in Fcalc calculation.
There quite a few of them in PDB (see below).

Pavel.

1au9.log:  "HETATM 1951 UNK  UNX A 277 .*.     X  "
1b3o.log:  "HETATM 5493 UNK  UNX B 632 .*.     X  "
1h1a.log:  "HETATM 3018  UNK UNX A1193 .*.     X  "
1i1w.log:  "HETATM 4554 UNK  UNX A1406 .*.     X  "
1itk.log:  "HETATM11213 UNK  UNX A2017 .*.     X  "
1j5e.log:  "HETATM51767 UNK  UNX A1545 .*.     X  "
1ji4.log:  "HETATM14366 UNK  UNX A 802 .*.     X  "
1kdg.log:  "HETATM 8430 UNK  UNX B 904 .*.     X  "
1lfo.log:  "HETATM 1052 UNK  UNX A 131 .*.     X  "
1obp.log:  "HETATM 3161 UNK  UNX A 161 .*.     X  "
1r9l.log:  "HETATM 2391 UNK  UNX A1310 .*.     X  "
1r9q.log:  "HETATM 2383 UNK  UNX A1310 .*.     X  "
1rkt.log:  "HETATM 3389 UNK  UNX A 415 .*.     X  "
1s3l.log:  "HETATM 2662 UNK  UNX A 503 .*.     X  "
1s9r.log:  "HETATM 6562 UNK  UNX A 956 .*.     X  "
1som.log:  "HETATM 4204 UNK  UNX A1000 .*.     X  "
1xho.log:  "HETATM 2573 UNK  UNX B 119 .*.     X  "
1xi3.log:  "HETATM 3057 UNK  UNX A 403 .*.     X  "
1xma.log:  "HETATM 1723 UNK  UNX A 403 .*.     X  "
1xqu.log:  "HETATM 1736 UNK  UNX A 401 .*.     X  "
1xrg.log:  "HETATM 3035 UNK  UNX A 401 .*.     X  "
1xx7.log:  "HETATM 7736 UNK  UNX A2001 .*.     X  "
1y80.log:  "HETATM 1012 UNK  UNX A 601 .*.     X  "
1y81.log:  "HETATM  939 UNK  UNX A 401 .*.     X  "
1y82.log:  "HETATM 4478 UNK  UNX A 303 .*.     X  "
1yb3.log:  "HETATM 1425 UNK  UNX A 401 .*.     X  "
1ybx.log:  "HETATM 1348 UNK  UNX A 201 .*.     X  "
1yby.log:  "HETATM 2729 UNK  UNX A1004 .*.     X  "
1ybz.log:  "HETATM  602 UNK  UNX A 101 .*.     X  "
1yd7.log:  "HETATM 1281 UNK  UNX A 388 .*.     X  "
1yem.log:  "HETATM 2700 UNK  UNX A 202 .*.     X  "
1z2u.log:  "HETATM 1288 UNK  UNX A 501 .*.     X  "
1zd0.log:  "HETATM 1142 UNK  UNX A 401 .*.     X  "
1zgh.log:  "HETATM 1811 UNK  UNX A 231 .*.     X  "
1zuu.log:  "HETATM  538 UNK  UNX A1001 .*.     X  "
2a4k.log:  "HETATM 3122 UNK  UNX A 264 .*.     X  "
2aed.log:  "HETATM 1217 UNK  UNX A 301 .*.     X  "
2ajp.log:  "HETATM 4594 UNK  UNX A 402 .*.     X  "
2amx.log:  "HETATM 5871 UNK  UNX A2000 .*.     X  "
2ar0.log:  "HETATM 7678 UNK  UNX A1001 .*.     X  "
2awp.log:  "HETATM 3181 UNK  UNX A1000 .*.     X  "
2ayv.log:  "HETATM 1140 UNK  UNX A 147 .*.     X  "
2b0r.log:  "HETATM 2435 UNK  UNX A1001 .*.     X  "
2b25.log:  "HETATM 3834 UNK  UNX A 701 .*.     X  "
2b6h.log:  "HETATM 1388 UNK  UNX A 301 .*.     X  "
2c4b.log:  "HETATM 2536  UNK UNX D   1 .*.     X  "
2chh.log:  "HETATM  934  UNK UNX A1116 .*.     X  "
2dyr.log:  "HETATM28937 UNK  UNX C 262 .*.     X  "
2dys.log:  "HETATM28967 UNK  UNX C 262 .*.     X  "
2f4z.log:  "HETATM 2268 UNK  UNX B4000 .*.     X  "
2fol.log:  "HETATM 1271 UNK  UNX A 401 .*.     X  "
2fv7.log:  "HETATM 4571 UNK  UNX A 501 .*.     X  "
2gao.log:  "HETATM 2692 UNK  UNX A 602 .*.     X  "
2h16.log:  "HETATM 4869 UNK  UNX A2001 .*.     X  "
2h17.log:  "HETATM 1344 UNK  UNX A 301 .*.     X  "
2h18.log:  "HETATM 1419 UNK  UNX A 401 .*.     X  "
2h57.log:  "HETATM 3955 UNK  UNX A 503 .*.     X  "
2h58.log:  "HETATM 2552 UNK  UNX A 401 .*.     X  "
2heh.log:  "HETATM 2523 UNK  UNX A 801 .*.     X  "
2hlz.log:  "HETATM 9050 UNK  UNX A 701 .*.     X  "
2hp0.log:  "HETATM 6991 UNK  UNX A1101 .*.     X  "
2hp3.log:  "HETATM 6895 UNK  UNX A1201 .*.     X  "
2hte.log:  "HETATM 6731 UNK  UNX A3002 .*.     X  "
2hup.log:  "HETATM 2487 UNK  UNX A 401 .*.     X  "
2i7q.log:  "HETATM 2855 UNK  UNX A1001 .*.     X  "
2ig7.log:  "HETATM 5622 UNK  UNX A1004 .*.     X  "
2ija.log:  "HETATM 2434 UNK  UNX A 501 .*.     X  "
2il1.log:  "HETATM 1326 UNK  UNX A1401 .*.     X  "
2iqj.log:  "HETATM 1949 UNK  UNX A1001 .*.     X  "
2jax.log:  "HETATM 2008  UNK UNX A1297 .*.     X  "
2jbv.log:  "HETATM 8225  UNK UNX A2500 .*.     X  "
2jcm.log:  "HETATM 3839  UNK UNX A1489 .*.     X  "
2jim.log:  "HETATM 5752  UNK UNX A 813 .*.     X  "
2jio.log:  "HETATM 5771  UNK UNX A 813 .*.     X  "
2jip.log:  "HETATM 5727  UNK UNX A 813 .*.     X  "
2jiq.log:  "HETATM 5727  UNK UNX A 813 .*.     X  "
2nzt.log:  "HETATM13368 UNK  UNX A   1 .*.     X  "
2o1z.log:  "HETATM 4415 UNK  UNX A2001 .*.     X  "
2o52.log:  "HETATM 2572 UNK  UNX A1003 .*.     X  "
2ocb.log:  "HETATM 1403 UNK  UNX A1001 .*.     X  "
2oil.log:  "HETATM 1367 UNK  UNX A1001 .*.     X  "
2olm.log:  "HETATM 1092 UNK  UNX A1001 .*.     X  "
2p57.log:  "HETATM  984 UNK  UNX A 202 .*.     X  "
2p5s.log:  "HETATM 2461 UNK  UNX A 101 .*.     X  "
2pfr.log:  "HETATM 4716 UNK  UNX A1002 .*.     X  "
2pmu.log:  "HETATM 4832 UNK  UNX A6002 .*.     X  "
2pq8.log:  "HETATM 2174 UNK  UNX A 701 .*.     X  "
2pqt.log:  "HETATM 2400 UNK  UNX A 401 .*.     X  "
2px4.log:  "HETATM 2114 UNK  UNX A 801 .*.     X  "
2qsy.log:  "HETATM 1510 UNK  UNX A1103 .*.     X  "
2qsz.log:  "HETATM 1589 UNK  UNX A1001 .*.     X  "
2qt1.log:  "HETATM 1612 UNK  UNX A 203 .*.     X  "
2r2q.log:  "HETATM 1908 UNK  UNX A   1 .*.     X  "
2r8t.log:  "HETATM 2409 UNK  UNX A 338 .*.     X  "
2rep.log:  "HETATM 2183 UNK  UNX A   1 .*.     X  "
2rex.log:  "HETATM 4296 UNK  UNX A   1 .*.     X  "
2v3v.log:  "HETATM 5782  UNK UNX A 813 .*.     X  "
2v45.log:  "HETATM 5752  UNK UNX A 813 .*.     X  "
2vya.log:  "HETATM 8368  UNK UNX A1576 .*.     X  "
2w2j.log:  "HETATM 2289 UNK  UNX A 601 .*.     X  "
2wbi.log:  "HETATM 6139  UNK UNX A1428 .*.     X  "
2wtl.log:  "HETATM 7799 UNK  UNX A1001 .*.     X  "
2x2u.log:  "HETATM 1955 UNK  UNX A1283 .*.     X  "
2x8b.log:  "HETATM 4669 UNK  UNX A1556 .*.     X  "
2zxw.log:  "HETATM28739 UNK  UNX C 262 .*.     X  "
3a1p.log:  "HETATM 3915 UNK  UNX D 500 .*.     X  "
3abk.log:  "HETATM28972 UNK  UNX C 262 .*.     X  "
3abl.log:  "HETATM28739 UNK  UNX C 262 .*.     X  "
3abm.log:  "HETATM28654 UNK  UNX C 262 .*.     X  "
3ag1.log:  "HETATM28969 UNK  UNX C 262 .*.     X  "
3ag2.log:  "HETATM28998 UNK  UNX C 262 .*.     X  "
3ag3.log:  "HETATM28921 UNK  UNX C 262 .*.     X  "
3ag4.log:  "HETATM28854 UNK  UNX C 262 .*.     X  "
3b6u.log:  "HETATM 5169 UNK  UNX A 403 .*.     X  "
3b6v.log:  "HETATM 4537 UNK  UNX A1003 .*.     X  "
3bfn.log:  "HETATM 2194 UNK  UNX A 701 .*.     X  "
3big.log:  "HETATM 2430 UNK  UNX A 400 .*.     X  "
3bih.log:  "HETATM 2405 UNK  UNX A 400 .*.     X  "
3c5c.log:  "HETATM 5222 UNK  UNX A 204 .*.     X  "
3c6g.log:  "HETATM 7630 UNK  UNX A   1 .*.     X  "
3cbq.log:  "HETATM 1348 UNK  UNX A   1 .*.     X  "
3chb.log:  "HETATM 4161 UNK  UNX D 109 .*.     X  "
3con.log:  "HETATM 1250 UNK  UNX A 206 .*.     X  "
3cpf.log:  "HETATM 1892 UNK  UNX A   1 .*.     X  "
3cxl.log:  "HETATM 3171 UNK  UNX A 503 .*.     X  "
3czh.log:  "HETATM 7639 UNK  UNX A   1 .*.     X  "
3dax.log:  "HETATM 7565 UNK  UNX A   1 .*.     X  "
3day.log:  "HETATM 4287 UNK  UNX A 681 .*.     X  "
3dlj.log:  "HETATM 7188 UNK  UNX A2004 .*.     X  "
3dwd.log:  "HETATM 1761 UNK  UNX A 502 .*.     X  "
3dz8.log:  "HETATM 1428 UNK  UNX A 501 .*.     X  "
3dzx.log:  "HETATM 2238 UNK  UNX A   1 .*.     X  "
3e43.log:  "HETATM 4435 UNK  UNX A 259 .*.     X  "
3eap.log:  "HETATM 6466 UNK  UNX A 254 .*.     X  "
3edt.log:  "HETATM 8082 UNK  UNX D   1 .*.     X  "
3eo2.log:  "HETATM 1470 UNK  UNX A   1 .*.     X  "
3f2r.log:  "HETATM 5368 UNK  UNX A 606 .*.     X  "
3feg.log:  "HETATM 2998 UNK  UNX A 400 .*.     X  "
3feh.log:  "HETATM 2860 UNK  UNX A 501 .*.     X  "
3fk2.log:  "HETATM 6162 UNK  UNX A   1 .*.     X  "
3flv.log:  "HETATM 1516 UNK  UNX B 102 .*.     X  "
3fm8.log:  "HETATM 7167 UNK  UNX A   6 .*.     X  "
3fye.log:  "HETATM12580 UNK  UNX A 573 .*.     X  "
3fzy.log:  "HETATM 3524 UNK  UNX A 323 .*.     X  "
3g15.log:  "HETATM 5455 UNK  UNX A 606 .*.     X  "
3g2g.log:  "HETATM14619 UNK  UNX A 534 .*.     X  "
3gf9.log:  "HETATM 1411 UNK  UNX A   1 .*.     X  "
3gft.log:  "HETATM 7772 UNK  UNX A 170 .*.     X  "
3gqy.log:  "HETATM15091 UNK  UNX A 532 .*.     X  "
3gr4.log:  "HETATM15389 UNK  UNX A 532 .*.     X  "
3gro.log:  "HETATM 4238 UNK  UNX A   3 .*.     X  "
3h5z.log:  "HETATM 3482 UNK  UNX A3001 .*.     X  "
3h6n.log:  "HETATM  779 UNK  UNX A1679 .*.     X  "
3h6o.log:  "HETATM14786 UNK  UNX A 532 .*.     X  "
3hlj.log:  "HETATM 2100 UNK  UNX A 264 .*.     X  "
3hm6.log:  "HETATM 4081 UNK  UNX X   1 .*.     X  "
3i44.log:  "HETATM 3649 UNK  UNX A 478 .*.     X  "
3ihw.log:  "HETATM 1299 UNK  UNX A   1 .*.     X  "
3ijp.log:  "HETATM 4064 UNK  UNX A 268 .*.     X  "
3inn.log:  "HETATM 8683 UNK  UNX A 301 .*.     X  "
3iug.log:  "HETATM 2998 UNK  UNX A   6 .*.     X  "
3jzy.log:  "HETATM 1080 UNK  UNX A   1 .*.     X  "
3k35.log:  "HETATM12819 UNK  UNX A 322 .*.     X  "
3k5k.log:  "HETATM 4292 UNK  UNX A1199 .*.     X  "
3krb.log:  "HETATM 4959 UNK  UNX A 402 .*.     X  "
3krs.log:  "HETATM 3917 UNK  UNX A 302 .*.     X  "
3kup.log:  "HETATM 1843 UNK  UNX A   3 .*.     X  "
3kuq.log:  "HETATM 1510 UNK  UNX A   1 .*.     X  "
3kuz.log:  "HETATM 1611 UNK  UNX A   1 .*.     X  "
3kxa.log:  "HETATM 4108 UNK  UNX A 201 .*.     X  "
3l46.log:  "HETATM 1497 UNK  UNX A   3 .*.     X  "
3l4b.log:  "HETATM 9053 UNK  UNX B 145 .*.     X  "
3lgd.log:  "HETATM 7908 UNK  UNX A 951 .*.     X  "
3llu.log:  "HETATM 1551 UNK  UNX A   1 .*.     X  "
3lp8.log:  "HETATM 3195 UNK  UNX A 423 .*.     X  "
3lq3.log:  "HETATM 2900 UNK  UNX A 398 .*.     X  "
3lx7.log:  "HETATM 1129 UNK  UNX A 294 .*.     X  "
3lxw.log:  "HETATM 3137 UNK  UNX A   1 .*.     X  "
3md0.log:  "HETATM 2244 UNK  UNX A 336 .*.     X  "
3me3.log:  "HETATM15227 UNK  UNX A 533 .*.     X  "
3met.log:  "HETATM 2873 UNK  UNX A   1 .*.     X  "
3nni.log:  "HETATM 4124 UNK  UNX A   4 .*.     X  "
3nwn.log:  "HETATM 2456 UNK  UNX A1001 .*.     X  "
4hb1.log:  "HETATM  362 UNK  UNX A 801 .*.     X  "
4uag.log:  "HETATM 3299 UNK  UNX A 986 .*.     X  "

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