Table 1 The fragments of sculptin generated by factor Xa.

From: Revisiting antithrombotic therapeutics; sculptin, a novel specific, competitive, reversible, scissile and tight binding inhibitor of thrombin

Fragment numbera

Fragment of sculptinb

Theoretical Average Mass

Calculated Average Massc

H1d

GKPQGHPHDALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDERALEAR

5156.74

5153.57

H2d

SDAVHTAVPKMPKGGHGGFEPIPIDYDERALEAR

3663.10

3667.50

SDAVHTAVPKMPKGGHGGFEPIPIDYDERALHALEHHHHHH

4579.05

4582.40

H3d

SDAVHTAVPKMPKGGHGGFEPIPIDYDERALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDERALHALEHHHHHH

8223.13

8220.55

SDAVHTAVPKMPKGGHGGFEPIPIDYDERALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDER

6765.55

6770.60

H4d

SDAVHTAVPKMPKGGHGGFEPIPIDYDERALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDERALEAR

7306.17

7299.61

GKPQGHPHDALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDERALEARSDAVHTAVPKMPKGGLGGFEPIPIDYDERALEARSDAVHTAVPKMPKGGHGGFEPIPIDYDERALEAR

12420.90

12427.54

  1. Sculptin (10 µM) was incubated without or with 1 µM of factor Xa in 50 mM phosphate buffer containing 150 mM NaCl and 50 µM PS/PC, pH 7.4 for 6 h at 37 °C. The reaction mixtures were separated by reverse phase C-18 HPLC column. The peaks were subjected to MALDI-TOF MS.
  2. aPeak number of the HPLC chromatogram (Fig. 5A).
  3. bFragment of sculptin generated by factor Xa.
  4. cThe experimental average mass calculated by MALDI-TOF mass spectrometry (Fig. 5B).
  5. dThe fractions (HPLC peaks) were subjected to thrombin inhibition test (Fig. 5C,D).