Structures of the noncovalent complexes of human and bovine prothrombin fragment 2 with human ppack-thrombin

d-Phe-Pro-Arg chloromethylketone (PPACK)

Structure of the Hirugen and Hirulog 1 Complexes of Alpha-Thrombin

The Refined Structure of the Epsilon-Aminocaproic Acid Complex of Human Plasminogen Kringle 4

Structure of Bovine Prothrombin Fragment 1 Refined at 2.25 Angstroms Resolution

IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISM
LEKIYIHPRYNWRENLDRDIALMKLKKPVAFSDYIHPVCLPDRETAASLLQAGYKGRVTGWGNLKETWTANVGKGQPSVL
QVVNLPIVERPVCKDSTRIRITDNMFCAGYKPDEGKRGDACEGDSGGPFVMKSPFNNRWYQMGIVSWGEGCDRDGKYGFY
THVFRLKKWIQKVIDQFGE

THROMBIN IS CLEAVED BETWEEN RESIDUES 15 AND 16. CHAIN INDICATOR *L* IS USED FOR RESIDUES 1H - 15 AND CHAIN INDICATOR *H* IS USED FOR RESIDUES 16 - 247. CHAIN INDICATOR *P* IS USED FOR PROTHROMBIN FRAGMENT 2.
THE INHIBITOR IS COVALENTLY CONNECTED TO ACTIVE_SITE RESIDUE VIA A METHYLENE GROUP TO NE2 HIS H 57.
CHYMOTRYPSIN NUMBERING (RATHER THAN SEQUENTIAL) SYSTEM IS USED, BASED ON THE TOPOLOGICAL ALIGNMENT WITH THE STRUCTURE OF CHYMOTRYPSIN (W.BODE ET AL., 1989, EMBO J. 8, 3467-3475).

A FEW SIDE CHAINS IN BOTH THROMBIN AND FRAGMENT 2 DO NOT
HAVE WELL DEFINED ELECTRON DENSITY. THESE ATOMS HAVE BEEN
GIVEN OCCUPANCIES OF 0.0 IN THE FILE.
THE FOLLOWING RESIDUES IN FRAGMENT 2 DO NOT HAVE ELECTRON
DENSITY FOR THE SIDE CHAIN BEYOND CB:
VAL 302, ARG 305, GLN 307, GLN 310, ARG 312,
THR 316, SER 327, LYS 331, SER 341, VAL 343, GLN 344, VAL
346, LYS 367 AND ASN 377. IN ADDITION, THERE WAS NO
ELECTRON DENSITY FOR THE 14 N-TERMINAL AND 23 C-TERMINAL
INTERKRINGLE PEPTIDES.

SERINE PROTEINASE, HYDROLASE-HYDROLASE INHIBITOR complex

MAHVRGLQLPGCLALAALCSLVHSQHVFLAPQQARSLLQRVRRANTFLEEVRKGNLERECVEETCSYEEAFEALESSTAT
DVFWAKYTACETARTPRDKLAACLEGNCAEGLGTNYRGHVNITRSGIECQLWRSRYPHKPEINSTTHPGADLQENFCRNP
DSSTTGPWCYTTDPTVRRQECSIPVCGQDQVTVAMTPRSEGSSVNLSPPLEQCVPDRGQQYQGRLAVTTHGLPCLAWASA
QAKALSKHQDFNSAVQLVENFCRNPDGDEEGVWCYVAGKPGDFGYCDLNYCEEAVEEETGDGLDEDSDRAIEGRTATSEY
QTFFNPRTFGSGEADCGLRPLFEKKSLEDKTERELLESYIDGRIVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRW
VLTAAHCLLYPPWDKNFTENDLLVRIGKHSRTRYERNIEKISMLEKIYIHPRYNWRENLDRDIALMKLKKPVAFSDYIHP
VCLPDRETAASLLQAGYKGRVTGWGNLKETWTANVGKGQPSVLQVVNLPIVERPVCKDSTRIRITDNMFCAGYKPDEGKR
GDACEGDSGGPFVMKSPFNNRWYQMGIVSWGEGCDRDGKYGFYTHVFRLKKWIQKVIDQFGE