There is a restriction that linkage names be no more than four characters long, so the names used for sugar linkages in autoBUSTER are the rather opaque S001, S002 ... Here's a glossary of what the links actually entail.
| Link name | Atoms involved in link | Notes |
| S001 | ASN ND2 to C1 on a pyranose | the most common way for a saccharide chain to attach to a protein |
| S002 | SER OG to C1 on a pyranose | probably the second most common way for a protein to be glycosylated, but much rarer than S001 |
| S003 | THR OG1 to C1 on a pyranose | this linkage is extremely rare, it's not present in any PDB deposition between August 2007 and May 2008 |
| S004 | C1 on a pyranose linking to O2 on the previous residue in the saccharide chain | |
| S005 | C1 on a pyranose linking to O3 on the previous residue in the saccharide chain | |
| S006 | C1 on a pyranose linking to O4 on the previous residue in the saccharide chain | |
| S007 | C1 on a pyranose linking to O6 on the previous residue in the saccharide chain | |
| S008 | O3 on a pyranose linking to C2 on a sialic-acid residue at the end of a saccharide chain |
Most autoBUSTER linkages are from a residue to one with a larger number, but the tradition in saccharide chemistry is to describe the way that the linkage is formed, IE to describe it as from the newly-added residue to the one that it linked to.
Page by Tom Womack original version 2 June 2008. Address problems, corrections and clarifications buster-develop@globalphasing.com
