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data:cathdomaindescriptionfile [2008/09/16 07:27] – garnerdata:cathdomaindescriptionfile [2014/11/07 14:56] (current) – sillitoe
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 ===== Cath Domain and Segment Naming Conventions ===== ===== Cath Domain and Segment Naming Conventions =====
  
-Cath domain names are described by 7 characters (e.g. 1abcA01).+==== CATH Domain Names ====
  
-^ Characters      ^ Description  ^ +The domain names have seven characters (e.g. 1oaiA00).
-| 1-4  | PDB Code  | +
-| 5    | Chain Character. \\ From the chain field of the PDB file. \\ Zero ('0') indicates that the PDB file has no chain field.  | +
-| 6-7  | Domain Number \\ Sequentially assigned domain number, 01, 02, 03 etc. \\ Zero ('00') indicates that the domain is a whole PDB chain. |+
  
-NB: Before CATH v3.0.0 the domain identifier only contained 6 characters as the domain number was a single digit. This was changed due to some chains containing more than 10 domains (although this is very rare).+<code> 
 +CHARACTERS 1-4: PDB Code 
 +The first 4 characters determine the PDB code e.g. 1oai 
 + 
 +CHARACTER 5: Chain Character 
 +This determines which PDB chain is represented. 
 +Chain characters of zero ('0') indicate that the PDB file has no chain field. 
 + 
 +CHARACTER 6-7: Domain Number 
 +The domain number is a 2-figure, zero-padded number (e.g. '01', '02' ... '10', '11', '12'). Where the domain number is a double ZERO ('00') this indicates that the domain is a whole PDB chain with no domain chopping.  
 +</code> 
 + 
 +==== CATH Segment Names ====
  
-Cath segments (continuous regions of sequence within a domain) are described+CATH segments (continuous regions of sequence within a domain) are described
 adding colon separated numbers to the end of the domain name. adding colon separated numbers to the end of the domain name.
 +
 The first number is the sequential number of the segment. The first number is the sequential number of the segment.
 +
 The second number is the total number of segments in this domain. The second number is the total number of segments in this domain.
  
 <code> <code>
-1abc01:1:2 +1abcA01:1:2 
-xxxxxxooooo+xxxxxxxooooo
  
 x = standard CATH six character domain name x = standard CATH six character domain name
 o = segment information :ThisSegment:TotalSegments o = segment information :ThisSegment:TotalSegments
 </code> </code>
 +
  
  
  
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