Overview
CISPEP records specify the prolines and other peptides found to be in the cis conformation. This record replaces the use of footnote records to list cis peptides.
Record Format
COLUMNS DATA TYPE FIELD DEFINITION
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1 - 6 Record name "CISPEP"
8 - 10 Integer serNum Record serial number.
12 - 14 LString(3) pep1 Residue name.
16 Character chainID1 Chain identifier.
18 - 21 Integer seqNum1 Residue sequence number.
22 AChar icode1 Insertion code.
26 - 28 LString(3) pep2 Residue name.
30 Character chainID2 Chain identifier.
32 - 35 Integer seqNum2 Residue sequence number.
36 AChar icode2 Insertion code.
44 - 46 Integer modNum Identifies the specific model.
54 - 59 Real(6.2) measure Measure of the angle in
degrees.
Details
* Cis peptides are those with omega angles of 0°±30°. Deviations larger than 30° are listed in REMARK 500.
* Each cis peptide is listed on a separate line, with an incrementally ascending sequence number.
Verification/Validation/Value Authority Control
PDB generates these records automatically, however, the depositor may wish to list cis peptides at the time of submission.
Relationships to Other Record Types
CISPEP is replacing the footnote which previously contained this information.
Peptide bonds which deviate significantly from either cis or trans conformation are annotated in REMARK 500.
Example
1 2 3 4 5 6 7
1234567890123456789012345678901234567890123456789012345678901234567890
CISPEP 1 GLY A 116 GLY A 117 0 18.50
CISPEP 2 THR D 92 PRO D 93 0 359.80