2.3 ANGSTROMS CRYSTAL STRUCTURE OF CHICKEN LIVER DIHYDROFOLATE REDUCTASE COMPLEXED WITH THIONADP+ AND BIOPTERIN

RESIDUES 21-26 FORM A LEFT-HANDED POLYPROLINE HELIX.

RESIDUE SER 102 PARTICIPATES IN BOTH HELIX E AND HELIX EP.

RESIDUES LYS 108 AND VAL 109 PARTICIPATE IN BOTH HELIX EP AND BETA STRAND E.

RESIDUES ASP 110 AND MET 111 FORM A BETA-BULGE IN STRAND E.

RESIDUES VAL 115 AND GLY 116 FORM A BETA-BULGE IN STRAND E.

PEPTIDE BOND JOINING GLY 116 AND GLY 117 IS CIS.

TIGHT TURN 7 (RESIDUES 162-165) DISRUPT LAST STRAND OF SHEET INTO 2 STRANDS 8 AND 9. THIS STRAND IS CONTINUOUS IN (E. COLI). A BETA BULGE IS PRESENT HERE IN (L. CASEI).

RESIDUES GLU 172 AND ILE 175 PARTICIPATE IN BOTH TIGHT-TURN 8 AND BETA STRANDS 7 AND 9.

RESIDUE 200 (CALCIUM ION) LIES ON THE CRYSTALLOGRAPHIC TWO-FOLD AT ONE-HALF OCCUPANCY.

7-THIONICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

Crystal structures of chicken liver dihydrofolate reductase: binary thioNADP+ and ternary thioNADP+.biopterin complexes.

Crystal Structures of Recombinant Human Dihydrofolate Reductase Complexed with Folate and 5-Deazafolate

Refined Crystal Structure of Escherichia Coli and Chicken Liver Dihydrofolate Reductase Containing Bound Trimethoprim

Dihydrofolate Reductase, the Stereochemistry of Inhibitor Selectivity

Crystal Structure of Avian Dihydrofolate Reductase Containing Phenyltriazine and Nadph

Primary Structure of Chicken Liver Dihydrofolate Reductase

VRSLNSIVAVCQNMGIGKDGNLPWPPLRNEYKYFQRMTSTSHVEGKQNAVIMGKKTWFSIPEKNRPLKDRINIVLSRELK
EAPKGAHYLSKSLDDALALLDSPELKSKVDMVWIVGGTAVYKAAMEKPINHRLFVTRILHEFESDTFFPEIDYKDFKLLT
EYPGVPADIQEEDGIQYKFEVYQKSVLAQ

HELIX

RESIDUES 21-26 FORM A LEFT-HANDED POLYPROLINE HELIX.

RESIDUE SER 102 PARTICIPATES IN BOTH HELIX E AND HELIX EP.

RESIDUES LYS 108 AND VAL 109 PARTICIPATE IN BOTH HELIX EP AND BETA STRAND E.

SHEET

RESIDUES ASP 110 AND MET 111 FORM A BETA-BULGE IN STRAND E.

RESIDUES VAL 115 AND GLY 116 FORM A BETA-BULGE IN STRAND E.

RESIDUES GLU 172 AND ILE 175 PARTICIPATE IN BOTH TIGHT-TURN 8 AND BETA STRANDS 7 AND 9

TIGHT TURN 7 (RESIDUES 162-165) DISRUPT LAST STRAND OF SHEET INTO 2 STRANDS 8 AND 9. THIS STRAND IS CONTINUOUS IN (E. COLI). A BETA BULGE IS PRESENT HERE IN (L. CASEI).