Accession Numbers for Klotho Entries

We've added accession numbers for all primary terms (and their synonyms, of course) for all compounds listed in Klotho. The aim is to permit other databases across the Web to point to Klotho's pages using this common mechanism (and permit transition to the URN mechanism). Naturally I invite everyone to join the fun. The numbers are shown at the top of each entry, and collected into a table .

Like accession numbers in other databases, such as SwissProt, the numbers themselves will not change and will always refer to the same structure. The names may shift slightly, if we find for example that we've omitted a stereochemical descriptor, but the referenced molecule will always be the same. A fragment of the table illustrates this.

KLM0000001      1-L-myo-inositol-1-phosphate                                     html/1-L-myo-inositol-5-phosphate.html 
KLM0000001      1-L-myo-inositol-3-phosphate                                     html/1-L-myo-inositol-5-phosphate.html 
KLM0000001      1-L-myo-inositol-5-phosphate                                     html/1-L-myo-inositol-5-phosphate.html 
KLM0000001      myo-inositol-1-phosphate                                         html/1-L-myo-inositol-5-phosphate.html 
KLM0000001      myo-inositol-3-phosphate                                         html/1-L-myo-inositol-5-phosphate.html 
KLM0000001      myo-inositol-5-phosphate                                         html/1-L-myo-inositol-5-phosphate.html 
KLM0000002      17-alpha-hydroxyprogesterone                                     html/17-alpha-hydroxyprogesterone.html 
KLM0000004      2-hydroxyglutarate                                               html/2-hydroxyglutarate.html

Notice that the same molecule, 1-L-myo-inositol-5-phosphate, has six terms; the primary term (not necessarily the first in the list) is used as the root of the URL. [Incidentally, the reason the position of the phosphate varies is because the extreme symmetry of the inositols has given rise to many different naming conventions.] Because compound names must be sanitized to fit Unix file-naming conventions, the URL will not always precisely match the compound name (primes and parentheses are big offenders). In about ten cases we have pre-sanitized primary terms; these will change over the next months as we revamp our compound tracking procedures.

The numbers are designed to be unique and to catalogue a very large number of molecules of all types. They are structured as follows:

KL for Klotho, obviously. I hereby reserve the letter pairs AT, LA, and MO for the future.
X, where X is one of {M, C, S}. This is a designator we use to keep track of the type of structure --- a complete molecule (M), a substituent (S), or a class of molecules (C). Currently only type M structures are directly listed on the Web, though many substituents' config rules are included on the Web pages. (If you feel we should include pages for the substituents sooner rather than later, please drop me a line ).
N, a seven digit serial number. Currently, all molecules are serially numbered independent of type (giving a fair number of integers with which to play). In the unlikely event that we exceed this space, we can always number serially within each type. In either event, all accession numbers will remain unique.

The result is a fixed length, easily parsed and recognizable string. Enjoy!

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