HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND FOLATE

NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

Structural Basis for Selective Inhibition of Mycobacterium Avium Dihydrofolate Reductase by a Lipophilic Antifolate

MVGSLNCIVAVSQNMGIGKNGDLPWPPLRNEFRYFQRMTTTSSVEGKQNLVIMGKKTWFSIPEKNRPLKGRINLVLSREL
KEPPQGAHFLSRSLDDALKLTEQPELANKVDMVWIVGGSSVYKEAMNHPGHLKLFVTRIMQDFESDTFFPEIDLEKYKLL
PEYPGVLSDVQEEKGIKYKFEVYEKND

HUMAN DHFR/FOLATE COMPLEX WAS MIXED WITH NADPH (2 MM FINAL). CRYSTALS WERE GROWN BY HANGING DROP VAPOR DIFFUSION AT 277 K BY MIXING EQUAL VOLUMES OF PROTEIN/NADPH/FOLATE WITH RESERVOIR (24% PEG 4000, 200 MM LI2SO4, 100 MM TRIS.HCL, PH 8.75). TRUNCATED TRIANGULAR CRYSTALS APPEARED SLOWLY, IN ABOUT A MONTH. THE CRYSTAL WAS CRYOPROTECTED WITH 15% GLYCEROL AND FLASH-COOLED IN LIQUID N2.

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND 2,4-DIAMINO-5-(1-O- CARBORANYLMETHYL)-6-METHYLPYRIMIDINE, A NOVEL BORON CONTANING, NONCLASSICAL ANTIFOLATE

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND TRIMETHOPRIM

DIHYDROFOLATE REDUCTASE (DHFR) COMPLEX WITH FOLATE

DIHYDROFOLATE REDUCTASE (DHFR) COMPLEX WITH 5 -DEAZAFOLATE

STRUCTURE DETERMINATION OF TETRAHYDROQUINAZOLINEANTIFOALTES IN COMPLEX WITH HUMAN AND PNEUMOCYSTIS CARINIIDIHYDROFOLATE REDUCTASE: CORRELATIONS OF ENZYMESELECTIVITY AND STEREOCHEMISTRY

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND A LIPOPHILIC ANTIFOLATE SELECTIVE FOR MYCOBACTERIUM AVIUM DHFR, 6-((2,5- DIETHOXYPHENYL)AMINOMETHYL)-2,4-DIAMINO-5- METHYLPYRIDO(2,3-D)PYRIMIDINE (SRI-8686)

STRUCTURE DETERMINATION OF TETRAHYDROQUINAZOLINEANTIFOLATES IN COMPLEX WITH HUMAN AND PNEUMOCYSTIS CARINIIDIHYDROFOLATE REDUCTASE: CORRELATIONS OF ENZYMESELECTIVITY AND STEREOCHEMISTRY

ANALYSIS OF THREE CRYSTAL STRUCTURE DETERMINATIONS OF A 5-METHYL-6-N- METHYLANILINO PYRIDOPYRIMIDINE ANTIFOLATECOMPLEX WITH HUMAN DIHYDROFOLATE REDUCTASE

DIHYDROFOLATE REDUCTASE (DHFR) MUTANT WITH LEU 22 REPLACED BY TYR (L22Y) COMPLEXED WITH NADPH AND METHOTREXATE

DIHYDROFOLATE REDUCTASE (DHFR) MUTANT WITH LEU 22 REPLACED BY PHE (L22F) COMPLEXED WITH NADPH AND PIRITREXIM (PTX)

UNDERSTANDING THE ROLE OF LEU22 VARIANTS IN METHOTREXATERESISTANCE: COMPARISON OF WILD- TYPE AND LEU22ARG VARIANTMOUSE AND HUMAN DIHYDRFOLATE REDUCTASE TERNARY CRYSTALCOMPLEXES WITH METHOTREXATE AND NADPH

SOLUTION STRUCTURE OF HUMAN DIHYDROFOLATE REDUCTASECOMPLEXED WITH TRIMETHOPRIM AND NADPH , 25 STRUCTURES

HUMAN DIHYDROFOLATE REDUCTASE, ORTHORHOMBIC (P21 21 21) CRYSTAL FORM

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND 2,4-DIAMINO-5-((7,8- DICARBAUNDECABORAN-7-YL)METHYL)-6- METHYLPYRIMIDINE, A NOVEL BORON CONTANING, NONCLASSICAL ANTIFOLATE

HUMAN DIHYDROFOLATE REDUCTASE, MONOCLINIC (P21 ) CRYSTAL FORM

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND (Z)-6-(2-[2,5-DIMETHOXYPHENYL] ETHEN-1-YL)-2,4-DIAMINO-5-METHYLPYRIDO[2 ,3-D]PYRIMIDINE (SRI-9662), A LIPOPHILICANTIFOLATE

COMPARISON OF TERNARY CRYSTAL COMPLEXES OF HUMAN DIHYDROFOLATE REDUCTASE WITH NADPH AND A CLASSICAL ANTITUMOR FUROPYRIMDINE

ANALYSIS OF TWO POLYMORPHIC FORMS OF A PYRIDO[2,3-D]PYRIMIDINE N9-C10 REVERSE- BRIDGE ANTIFOLATE BINARYCOMPLEX WITH HUMAN DIHYDROFOLATE REDUCTASE

UNDERSTANDING THE ROLE OF LEU22 VARIANTS IN METHOTREXATERESISTANCE: COMPARISON OF WILD- TYPE AND LEU22ARG VARIANTMOUSE AND HUMAN DIHYDROFOLATE REDUCTASE TERNARY CRYSTALCOMPLEXES WITH METHOTREXATE AND NADPH

HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND 6-([5-QUINOLYLAMINO]METHYL)-2,4 -DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE ( SRI-9439), A LIPOPHILIC ANTIFOLATE

DIHYDROFOLATE REDUCTASE COMPLEX WITH FOLATE

STRUCTURE-BASED DESIGN AND SYNTHESIS OF LIPOPHILIC 2,4- DIAMINO-6-SUBSTITUTED QUINAZOLINES AND THEIR EVALUATION AS INHIBITORS OF DIHYDROFOLATE REDUCTASE AND POTENTIAL ANTITUMOR AGENTS

SHEET
THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN
ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW,
TWO SHEETS ARE DEFINED.

NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
(NDP): THE NADPH MAY BE A MIXTURE WITH THE OXIDIZED
CO-FACTOR, NADP(+). SEE NOTE ON FOLATE.
FOLIC ACID (FOL): THE OXIDATION STATE OF THE FOLATE LIGAND
IS UNCLEAR FROM THE EXPERIMENTAL ELECTRON DENSITY MAPS.
GIVEN THAT THE CRYSTAL WAS PREPARED WITH NADPH PRESENT,
THE LIGAND MAY BE A MIXTURE OF FOLATE, 7,8-DIHYDROFOLATE,
AND 5,6,7,8-TETRAHYDROFOLATE. IN ADDITION, THE OCCUPANCY
ASSIGNED TO FOLATE, 0.8, WAS CHOSEN SO THAT THE AVERAGE
TEMPERATURE FACTOR FOR THE PTERIDINE RING WAS SIMILAR TO
SURROUNDING RESIDUES IN THE ACTIVE SITE.

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. THE OXIDATION STATE OF THE FOLATE LIGAND IS UNCLEAR FROM THE EXPERIMENTAL ELECTRON DENSITY MAPS. GIVEN THAT THE CRYSTAL WAS PREPARED WITH NADPH PRESENT, THE LIGAND MAY BE A MIXTURE OF FOLATE, 7,8-DIHYDROFOLATE, AND 5,6,7,8- TETRAHYDROFOLATE. IN ADDITION, THE OCCUPANCY ASSIGNED TO FOLATE, 0.8, WAS CHOSEN SO THAT THE AVERAGE TEMPERATURE FACTOR FOR THE PTERIDINE RING WAS SIMILAR TO SURROUNDING RESIDUES IN THE ACTIVE SITE. ACCORDINGLY, THE NADPH MAY BE A MIXTURE WITH THE OXIDIZED CO-FACTOR, NADP(+).

NONCLASSICAL ANTIFOLATES, ONE-CARBON METABOLISM, LIPOPHILIC ANTIFOLATES, NADP, REDUCTASE, OXIDOREDUCTASE