Chains and Chain IDs: Difference between revisions

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Monomeric ligands and other non-polymers that are assigned the chain name of the associated polymer are always assigned the author-assigned polymer IDs, when the model is compatible with the PDB format -- and hence always get single-character names.

When the entry is not compatible with PDB format, for example it has >62 chains, some author-assigned chain names will have at least two characters. ~~An example is [[8qhu]], where 86 chains have coordinates in the deposited entry:~~

When the entry is not compatible with PDB format, for example it has >62 chains, some author-assigned chain names will have at least two characters.

* Author-assigned IDs: ~~1,2,3,4,5,6,7,8,~~A~~,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,S1,S4,SA,SB,SC,SD,SE,SF,SG,SH,SI,SJ,SK,SL,SM,SN,SO,SP,SQ,SR,SS,ST,SU,SV,SW,SX,SY,SZ,Sa,Sb,Sc,Sd,Se,Sf,Sg,Sh,T,U,V,W,X,Y,~~Z,a,b,c,d,e,f,~~g,h,i,j~~,~~k,l,m,n,o,p~~

* wwPDB-assigned IDs:

wwPDB-assigned chain IDs are all '''upper case letters''', and follow this sequence: A-Z, AA-ZA, BA-ZA, ... AZ-ZZ, AAA-ZAA, ABA-ZBA, etc.

Single character IDs cover 26 chains. Double letter IDs cover 26<sup>2</sup>=676. Triple-letter IDs cover 26<sup>3</sup>=17,576. Four-letter IDs are also allowed, covering >10 million unique IDs.

====Examples====

Chains and Chain IDs: Difference between revisions

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@@ Line 60: / Line 60: @@
 Monomeric ligands and other non-polymers that are assigned the chain name of the associated polymer are always assigned the author-assigned polymer IDs, when the model is compatible with the PDB format -- and hence always get single-character names.
-When the entry is not compatible with PDB format, for example it has >62 chains, some author-assigned chain names will have at least two characters. An example is [[8qhu]], where 86 chains have coordinates in the deposited entry:
+When the entry is not compatible with PDB format, for example it has >62 chains, some author-assigned chain names will have at least two characters.
-* Author-assigned IDs: 1,2,3,4,5,6,7,8,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,S1,S4,SA,SB,SC,SD,SE,SF,SG,SH,SI,SJ,SK,SL,SM,SN,SO,SP,SQ,SR,SS,ST,SU,SV,SW,SX,SY,SZ,Sa,Sb,Sc,Sd,Se,Sf,Sg,Sh,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p
-* wwPDB-assigned IDs:
+wwPDB-assigned chain IDs are all '''upper case letters''', and follow this sequence: A-Z, AA-ZA, BA-ZA, ... AZ-ZZ, AAA-ZAA, ABA-ZBA, etc.
+Single character IDs cover 26 chains. Double letter IDs cover 26<sup>2</sup>=676. Triple-letter IDs cover 26<sup>3</sup>=17,576. Four-letter IDs are also allowed, covering >10 million unique IDs.
 ====Examples====