Just a short observation:
I submitted an NMR ensemble that was split during the Haddock run. I just noticed that the first pdb structure (protein1.pdb) has a larger file size and some weird additional protons in each amino acid. This does not happen when I split the models using the pdb toolbox.
Comparison of the last amino acids from protein1.pdb and protein1_2.pdb:
ATOM 2651 N ASN A 125 11.103 13.351 0.652 1.00 1.09 N
ATOM 2652 CA ASN A 125 9.927 14.177 0.387 1.00 1.26 C
ATOM 2653 C ASN A 125 9.684 14.329 -1.109 1.00 1.21 C
ATOM 2654 O ASN A 125 9.496 15.438 -1.615 1.00 1.45 O
ATOM 2655 CB ASN A 125 10.047 15.553 1.052 1.00 1.53 C
ATOM 2656 CG ASN A 125 9.996 15.479 2.567 1.00 2.04 C
ATOM 2657 ND2 ASN A 125 11.159 15.456 3.200 1.00 2.41 N
ATOM 2658 OD1 ASN A 125 8.919 15.464 3.163 1.00 2.79 O
ATOM 2659 O01 ASN A 125 9.674 13.166 -1.941 1.00 1.21 O
ATOM 2660 HN ASN A 125 10.984 12.505 1.136 1.00 1.24 H
ATOM 2661 HA ASN A 125 9.163 13.717 0.770 1.00 1.35 H
ATOM 2662 HB1 ASN A 125 9.237 16.182 0.713 1.00 1.91 H
ATOM 2663 HB2 ASN A 125 10.891 15.955 0.795 1.00 1.68 H
ATOM 2664 HD21 ASN A 125 11.878 15.484 2.729 1.00 2.46 H
ATOM 2665 HD22 ASN A 125 11.154 15.411 4.059 1.00 3.02 H
ATOM 2666 H ASN A 125 10.928 12.632 1.091 1.00 1.09 H
ATOM 2667 1HB ASN A 125 10.881 15.968 0.780 1.00 1.53 H
ATOM 2668 2HB ASN A 125 9.330 16.124 0.736 1.00 1.53 H
TER
END
ATOM 1990 N ASN A 125 10.190 13.200 0.090 1.00 1.09 A N
ATOM 1991 CA ASN A 125 8.966 13.923 -0.246 1.00 1.26 A C
ATOM 1992 C ASN A 125 8.789 14.020 -1.762 1.00 1.21 A C
ATOM 1993 O ASN A 125 8.721 15.111 -2.333 1.00 1.45 A O
ATOM 1994 CB ASN A 125 8.965 15.318 0.397 1.00 1.53 A C
ATOM 1995 CG ASN A 125 7.647 16.052 0.215 1.00 2.04 A C
ATOM 1996 ND2 ASN A 125 7.707 17.374 0.166 1.00 2.41 A N
ATOM 1997 OD1 ASN A 125 6.583 15.438 0.131 1.00 2.79 A O
ATOM 1998 O01 ASN A 125 8.700 12.820 -2.534 1.00 1.21 A O1-
ATOM 1999 HN ASN A 125 10.115 12.366 0.599 1.00 1.24 A H
ATOM 2000 HA ASN A 125 8.141 13.353 0.156 1.00 1.35 A H
ATOM 2001 HB1 ASN A 125 9.751 15.910 -0.049 1.00 1.91 A H
ATOM 2002 HB2 ASN A 125 9.153 15.219 1.454 1.00 1.68 A H
ATOM 2003 HD21 ASN A 125 8.585 17.804 0.251 1.00 2.46 A H
ATOM 2004 HD22 ASN A 125 6.870 17.872 0.035 1.00 3.02 A H
END
In the original pdb file, the first model looks like this:
ATOM 1990 N ASN 125 11.103 13.351 0.652 1.00 1.09 A N
ATOM 1991 CA ASN 125 9.927 14.177 0.387 1.00 1.26 A C
ATOM 1992 C ASN 125 9.684 14.329 -1.109 1.00 1.21 A C
ATOM 1993 O ASN 125 9.496 15.438 -1.615 1.00 1.45 A O
ATOM 1994 CB ASN 125 10.047 15.553 1.052 1.00 1.53 A C
ATOM 1995 CG ASN 125 9.996 15.479 2.567 1.00 2.04 A C
ATOM 1996 ND2 ASN 125 11.159 15.456 3.200 1.00 2.41 A N
ATOM 1997 OD1 ASN 125 8.919 15.464 3.163 1.00 2.79 A O
ATOM 1998 O01 ASN 125 9.674 13.166 -1.941 1.00 1.21 A O1-
ATOM 1999 HN ASN 125 10.984 12.505 1.136 1.00 1.24 A H
ATOM 2000 HA ASN 125 9.077 13.665 0.813 1.00 1.35 A H
ATOM 2001 HB1 ASN 125 9.237 16.182 0.713 1.00 1.91 A H
ATOM 2002 HB2 ASN 125 10.985 16.000 0.766 1.00 1.68 A H
ATOM 2003 HD21 ASN 125 11.979 15.488 2.663 1.00 2.46 A H
ATOM 2004 HD22 ASN 125 11.153 15.405 4.178 1.00 3.02 A H
ENDMDL
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