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Asym. Unit - sites (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Title :   TRYPANOSOMA CRUZI DIHYDROFOLATE REDUCTASE-THYMIDYLATE SYNTHASE COMPLEXED WITH CYCLOGUANIL

Authors :   P. Chitnumsub, J. Yuvaniyama, Y. Yuthavong

Date :   24 Aug 09 (Deposition) - 28 Jul 10 (Release) - 28 Jul 10 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.10

Chains :   Asym. Unit : A,B,C,D
Biol. Unit 1: A,B  (1x)
Biol. Unit 2: C,D  (1x)

Keywords :   Trypanosoma Cruzi, Dhfr-Ts Antifolate Complex, Methyltransferase, Multifunctional Enzyme, Nadp, Nucleotide Biosynthesis, One-Carbon Metabolism, Oxidoreductase, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   P. Chitnumsub, J. Yuvaniyama, T. Vilaivan, J. Vanichtanankul, S. Kamchonwongpaisan, Y. Yuthavong
Structural Basis Of Antifolate Inhibition Of Trypanosoma Cruzi Dihydrofolate Reductase-Thymidylate Synthase
To Be Published
PubMed: search

Molecule 1 - BIFUNCTIONAL DIHYDROFOLATE REDUCTASE-THYMIDYLATE SYNTHASE
	Chains	:	A, B, C, D
	EC Number	:	1.5.1.3, 2.1.1.45
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET11C
	Expression System Strain	:	BL21(DE3) PLYSS
	Expression System Taxid	:	469008
	Expression System Vector Type	:	PLASMID
	Organism Scientific	:	TRYPANOSOMA CRUZI
	Organism Taxid	:	5693
	Strain	:	Y
	Synonym	:	DHFR-TS, DIHYDROFOLATE REDUCTASE, THYMIDYLATE SYNTHASE

		1	2	3	4
Asymmetric Unit	:	A	B	C	D
Biological Unit 1 (1x)	:	A	B
Biological Unit 2 (1x)	:			C	D

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (3, 20)

No.	Name	Count	Type	Full Name
1	1CY	4	Ligand/Ion	1-(4-CHLOROPHENYL)-6,6-DIMETHYL-1,6-DIHYDRO-1,3,5-TRIAZINE-2,4-DIAMINE
2	ACT	8	Ligand/Ion	ACETATE ION
3	PO4	8	Ligand/Ion	PHOSPHATE ION

Biological Unit 1 (3, 12)

No.	Name	Count	Type	Full Name
1	1CY	2	Ligand/Ion	1-(4-CHLOROPHENYL)-6,6-DIMETHYL-1,6-DIHYDRO-1,3,5-TRIAZINE-2,4-DIAMINE
2	ACT	6	Ligand/Ion	ACETATE ION
3	PO4	4	Ligand/Ion	PHOSPHATE ION

Biological Unit 2 (3, 8)

No.	Name	Count	Type	Full Name
1	1CY	2	Ligand/Ion	1-(4-CHLOROPHENYL)-6,6-DIMETHYL-1,6-DIHYDRO-1,3,5-TRIAZINE-2,4-DIAMINE
2	ACT	2	Ligand/Ion	ACETATE ION
3	PO4	4	Ligand/Ion	PHOSPHATE ION

Asymmetric Unit (20, 20)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	VAL A:26 , VAL A:27 , ALA A:28 , ASP A:48 , MET A:49 , PHE A:52 , THR A:80 , ILE A:84 , ILE A:154 , TYR A:160	BINDING SITE FOR RESIDUE 1CY A 601
02	AC2	SOFTWARE	ARG A:423 , SER A:424 , HOH A:1626 , ARG B:383 , ARG B:384	BINDING SITE FOR RESIDUE PO4 A 701
03	AC3	SOFTWARE	ARG A:78 , LEU A:99 , SER A:100 , SER A:101 , THR A:102 , HOH A:1091	BINDING SITE FOR RESIDUE PO4 A 705
04	AC4	SOFTWARE	GLY A:77 , ARG A:78 , LYS A:79 , THR A:80 , GLY A:156 , SER A:158 , ACT A:802 , HOH A:1091	BINDING SITE FOR RESIDUE ACT A 801
05	AC5	SOFTWARE	ARG A:39 , LYS A:79 , GLY A:156 , GLY A:157 , SER A:158 , ACT A:801	BINDING SITE FOR RESIDUE ACT A 802
06	AC6	SOFTWARE	VAL A:193 , TRP A:206 , ARG A:208	BINDING SITE FOR RESIDUE ACT A 803
07	AC7	SOFTWARE	VAL B:26 , VAL B:27 , ALA B:28 , ARG B:39 , ASP B:48 , MET B:49 , PHE B:52 , THR B:80 , ILE B:84 , ILE B:154 , TYR B:160 , THR B:178	BINDING SITE FOR RESIDUE 1CY B 602
08	AC8	SOFTWARE	ARG A:383 , ARG A:384 , ARG B:423 , SER B:424	BINDING SITE FOR RESIDUE PO4 B 702
09	AC9	SOFTWARE	ARG B:78 , SER B:100 , SER B:101 , THR B:102 , HOH B:1545	BINDING SITE FOR RESIDUE PO4 B 706
10	BC1	SOFTWARE	GLY B:77 , ARG B:78 , LYS B:79 , THR B:80 , GLY B:156 , SER B:158	BINDING SITE FOR RESIDUE ACT B 804
11	BC2	SOFTWARE	SER B:24 , GLN B:173 , ALA B:174 , TYR B:176 , LYS B:229 , HOH B:1248 , HOH B:1580	BINDING SITE FOR RESIDUE ACT B 805
12	BC3	SOFTWARE	ILE B:248 , ASN B:474 , HOH B:1216 , HOH B:1578 , ARG D:208 , THR D:210 , ILE D:211	BINDING SITE FOR RESIDUE ACT B 806
13	BC4	SOFTWARE	VAL C:26 , VAL C:27 , ALA C:28 , ASP C:48 , PHE C:52 , THR C:80 , ILE C:84 , ILE C:154 , TYR C:160 , THR C:178	BINDING SITE FOR RESIDUE 1CY C 603
14	BC5	SOFTWARE	ARG C:423 , SER C:424 , ARG D:383 , ARG D:384	BINDING SITE FOR RESIDUE PO4 C 703
15	BC6	SOFTWARE	ARG C:78 , LEU C:99 , SER C:100 , SER C:101 , THR C:102 , HOH C:1005 , HOH C:1475	BINDING SITE FOR RESIDUE PO4 C 707
16	BC7	SOFTWARE	LYS C:79 , THR C:80 , GLY C:156 , SER C:158 , HOH C:1325	BINDING SITE FOR RESIDUE ACT C 807
17	BC8	SOFTWARE	VAL D:26 , VAL D:27 , ALA D:28 , ASP D:48 , MET D:49 , PHE D:52 , THR D:80 , ILE D:84 , ILE D:154 , THR D:178	BINDING SITE FOR RESIDUE 1CY D 604
18	BC9	SOFTWARE	ARG C:383 , ARG C:384 , ARG D:423 , SER D:424 , HOH D:1566	BINDING SITE FOR RESIDUE PO4 D 704
19	CC1	SOFTWARE	ARG D:78 , SER D:100 , SER D:101 , THR D:102 , HOH D:1008	BINDING SITE FOR RESIDUE PO4 D 708
20	CC2	SOFTWARE	GLY D:77 , LYS D:79 , THR D:80 , GLY D:156 , SER D:158 , VAL D:159 , HOH D:1338 , HOH D:1497	BINDING SITE FOR RESIDUE ACT D 808

(no "SS Bond" information available for 3IRM)

Asymmetric Unit

No.	Residues
1	Arg A:89	-	Pro A:90
2	Thr A:145	-	Pro A:146
3	Pro A:166	-	Pro A:167
4	Arg B:89	-	Pro B:90
5	Thr B:145	-	Pro B:146
6	Pro B:166	-	Pro B:167
7	Arg C:89	-	Pro C:90
8	Thr C:145	-	Pro C:146
9	Pro C:166	-	Pro C:167
10	Arg D:89	-	Pro D:90
11	Thr D:145	-	Pro D:146
12	Pro D:166	-	Pro D:167

(no "SAP(SNP)/Variant" information available for 3IRM)

Asymmetric Unit (3, 12)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	DHFR_2	PS51330	Dihydrofolate reductase (DHFR) domain profile.	DRTS_TRYCR	22-232	4	A:22-232 B:22-232 C:22-232 D:22-232
2	DHFR_1	PS00075	Dihydrofolate reductase (DHFR) domain signature.	DRTS_TRYCR	34-56	4	A:34-56 B:34-56 C:34-56 D:34-56
3	THYMIDYLATE_SYNTHASE	PS00091	Thymidylate synthase active site.	DRTS_TRYCR	383-411	4	A:383-411 B:383-411 C:383-411 D:383-411

Biological Unit 1 (3, 6)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	DHFR_2	PS51330	Dihydrofolate reductase (DHFR) domain profile.	DRTS_TRYCR	22-232	2	A:22-232 B:22-232 - -
2	DHFR_1	PS00075	Dihydrofolate reductase (DHFR) domain signature.	DRTS_TRYCR	34-56	2	A:34-56 B:34-56 - -
3	THYMIDYLATE_SYNTHASE	PS00091	Thymidylate synthase active site.	DRTS_TRYCR	383-411	2	A:383-411 B:383-411 - -

Biological Unit 2 (3, 6)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	DHFR_2	PS51330	Dihydrofolate reductase (DHFR) domain profile.	DRTS_TRYCR	22-232	2	- - C:22-232 D:22-232
2	DHFR_1	PS00075	Dihydrofolate reductase (DHFR) domain signature.	DRTS_TRYCR	34-56	2	- - C:34-56 D:34-56
3	THYMIDYLATE_SYNTHASE	PS00091	Thymidylate synthase active site.	DRTS_TRYCR	383-411	2	- - C:383-411 D:383-411

(no "Exon" information available for 3IRM)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:520
 aligned with DRTS_TRYCR | Q27793 from UniProtKB/Swiss-Prot  Length:521

    Alignment length:520
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420       430       440       450       460       470       480       490       500       510       520
           DRTS_TRYCR     1 MSLFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISMKMA 520
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhh.......hhhhh.....eeeeeeee...eee........hhhhhhhhhhhhhh............eeeeeeehhhhhh.hhhhh....eeeeee....hhhhhhhh..hhhhhhhhh..eeee..hhhhhhhhhh.......eeeeee..hhhhhhhhh..hhhh.eeeeeeeee........ee.......hhhhh...eeeeee...ee.......eeeeeeeee.hhhhhhhhhhhhhhhhhheeee.....eeeeeeeeeeeee.hhhh.........hhhhhhhhhhhhhh....hhhhhh..........hhhhhhhh............hhhhhhhhh................hhhhhhhhhhhhh......eee.....hhhhh.....eeeeeeeee..eeeeeeeeeeee..hhhhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeeeee..hhhhhhhhh........eeee.....hhhhhhhh.eeee............. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ---------------------DHFR_2  PDB: A:22-232 UniProt: 22-232                                                                                                                                                                              ------------------------------------------------------------------------------------------------------------------------------------------------------THYMIDYLATE_SYNTHASE         ------------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) ---------------------------------DHFR_1  PDB: A:34-56   -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3irm A   1 MSLFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISMKMA 520
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420       430       440       450       460       470       480       490       500       510       520

Chain B from PDB  Type:PROTEIN  Length:519
 aligned with DRTS_TRYCR | Q27793 from UniProtKB/Swiss-Prot  Length:521

    Alignment length:519
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512         
           DRTS_TRYCR     3 LFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISMKMAV 521
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..........hhhhh.....eeeeeeee...eee........hhhhhhhhhhhhhh............eeeeeeehhhhhh.hhhhh....eeeeee....hhhhhhhh.............eeee..hhhhhhhhh........eeeeee..hhhhhhhhh..hhhh.eeeeeeeee........ee.......hhhhh...eeeeee...ee.......eeeeeeeee.hhhhhhhhhhhhhhhhhheeee.....eeeeeeeeeeeee.hhhh.........hhhhhhhhhhhhhh....hhhhhh......hhhhhhhhhhhh.............hhhhhhhh................hhhhhhhhhhhhh......eee.....hhhhh.....eeeeeeeee..eeeeeeeeeeee..hhhhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeeeee..hhhhhhhhh........eeee.....hhhhhhhh.eeee.............. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) -------------------DHFR_2  PDB: B:22-232 UniProt: 22-232                                                                                                                                                                              ------------------------------------------------------------------------------------------------------------------------------------------------------THYMIDYLATE_SYNTHASE         -------------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) -------------------------------DHFR_1  PDB: B:34-56   --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3irm B   3 LFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISMKMAV 521
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512

Chain C from PDB  Type:PROTEIN  Length:516
 aligned with DRTS_TRYCR | Q27793 from UniProtKB/Swiss-Prot  Length:521

    Alignment length:516
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511      
           DRTS_TRYCR     2 SLFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISM 517
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ...........hhhhh.....eeeeeeee..............hhhhhhhhhhhhhh............eeeeeeehhhhhh.hhhhh....eeeeee....hhhhhhhh..hhhhhhhh...eeee..hhhhhhhhhh.......eeeeee..hhhhhhhhh..hhhh.eeeeeeeee.........................eeeeee...ee.......eeeeeeeee.hhhhhhhhhhhhhhhhhheeee.....eeeeeeeeeeeee.hhhh.........hhhhhhhhhhhhhh....hhhhhh......hhhhhhhhhhhh............hhhhhhhhh................hhhhhhhhhhhhh......eee.....hhhhh.....eeeeeeeee..eeeeeeeeeeee..hhhhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeeeee..hhhhhhhhh........eeee.....hhhhhhhh.eeee.......... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (1) --------------------DHFR_2  PDB: C:22-232 UniProt: 22-232                                                                                                                                                                              ------------------------------------------------------------------------------------------------------------------------------------------------------THYMIDYLATE_SYNTHASE         ---------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) --------------------------------DHFR_1  PDB: C:34-56   ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3irm C   2 SLFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPISM 517
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511

Chain D from PDB  Type:PROTEIN  Length:513
 aligned with DRTS_TRYCR | Q27793 from UniProtKB/Swiss-Prot  Length:521

    Alignment length:513
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512   
           DRTS_TRYCR     3 LFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPI 515
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..........hhhhh.....eeeeeeee..............hhhhhhhhhhhhhh............eeeeeeehhhhhh.hhhhh....eeeeee....hhhhhhhh....hhhhhh...eeee..hhhhhhhhhhh......eeeeeeeehhhhhhhhh..hhhh.eeeeeeeee.................hhhhh...eeeeee...ee.......eeeeeeeee.hhhhhhhhhhhhhhhhhheeee.....eeeeeeeeeeeee.hhhh.........hhhhhhhhhhhhhh....hhhhhh.....hhhhhhhhhhhh.............hhhhhhhhh................hhhhhhhhhhhhh......eee.....hhhhh.....eeeeeeeee..eeeeeeeeeeee..hhhhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeeeee..hhhhhhhhh........eeee.....hhhhhhhh.eeee........ Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) -------------------DHFR_2  PDB: D:22-232 UniProt: 22-232                                                                                                                                                                              ------------------------------------------------------------------------------------------------------------------------------------------------------THYMIDYLATE_SYNTHASE         -------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) -------------------------------DHFR_1  PDB: D:34-56   --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3irm D   3 LFKIRMPETVAEGTRLALRAFSLVVAVDEHGGIGDGRSIPWNVPEDMKFFRDLTTKLRGKNVKPSPAKRNAVVMGRKTWDSIPPKFRPLPGRLNVVLSSTLTTQHLLDGLPDEEKRNLHADSIVAVNGGLEQALRLLASPNYTPSIETVYCIGGGSVYAEALRPPCVHLLQAIYRTTIRASESSCSVFFRVPESGTEAAAGIEWQRETISEELTSANGNETKYYFEKLIPRNREEEQYLSLVDRIIREGNVKHDRTGVGTLSIFGAQMRFSLRNNRLPLLTTKRVFWRGVCEELLWFLRGETYAKKLSDKGVHIWDDNGSRAFLDSRGLTEYEEMDLGPVYGFQWRHFGAAYTHHDANYDGQGVDQIKAIVETLKTNPDDRRMLFTAWNPSALPRMALPPCHLLAQFYVSNGELSCMLYQRSCDMGLGVPFNIASYALLTILIAKATGLRPGELVHTLGDAHVYSNHVEPCNEQLKRVPRAFPYLVFRREREFLEDYEEGDMEVIDYAPYPPI 515
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

(no "SCOP Domain" information available for 3IRM)

(no "CATH Domain" information available for 3IRM)

(no "Pfam Domain" information available for 3IRM)

Asymmetric Unit(hide GO term definitions)

Chain A,B,C,D (DRTS_TRYCR | Q27793)

molecular function
	GO:0003824	catalytic activity	Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
	GO:0004146	dihydrofolate reductase activity	Catalysis of the reaction: 5,6,7,8-tetrahydrofolate + NADP+ = 7,8-dihydrofolate + NADPH + H+.
	GO:0008168	methyltransferase activity	Catalysis of the transfer of a methyl group to an acceptor molecule.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
	GO:0004799	thymidylate synthase activity	Catalysis of the reaction: 5,10-methylenetetrahydrofolate + dUMP = 7,8-dihydrofolate + thymidylate.
	GO:0016740	transferase activity	Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
biological process
	GO:0006231	dTMP biosynthetic process	The chemical reactions and pathways resulting in the formation of dTMP, deoxyribosylthymine monophosphate (2'-deoxyribosylthymine 5'-phosphate).
	GO:0006545	glycine biosynthetic process	The chemical reactions and pathways resulting in the formation of glycine, aminoethanoic acid.
	GO:0008152	metabolic process	The chemical reactions and pathways, including anabolism and catabolism, by which living organisms transform chemical substances. Metabolic processes typically transform small molecules, but also include macromolecular processes such as DNA repair and replication, and protein synthesis and degradation.
	GO:0032259	methylation	The process in which a methyl group is covalently attached to a molecule.
	GO:0009165	nucleotide biosynthetic process	The chemical reactions and pathways resulting in the formation of nucleotides, any nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the glycose moiety; may be mono-, di- or triphosphate; this definition includes cyclic-nucleotides (nucleoside cyclic phosphates).
	GO:0006730	one-carbon metabolic process	The chemical reactions and pathways involving the transfer of one-carbon units in various oxidation states.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0046654	tetrahydrofolate biosynthetic process	The chemical reactions and pathways resulting in the formation of tetrahydrofolate, 5,6,7,8-tetrahydrofolic acid, a folate derivative bearing additional hydrogens on the pterin group.

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	Cis Peptide Bonds
		Arg A:89 - Pro A:90	[ RasMol ]
		Arg B:89 - Pro B:90	[ RasMol ]
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	3irm
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	DRTS_TRYCR \| Q27793
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	1.5.1.3
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	2.1.1.45
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	DRTS_TRYCR \| Q27793
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UniProtKB/Swiss-Prot
	DRTS_TRYCR \| Q27793	:	2h2q 3cl9 3clb 3hbb 3inv 3irn 3iro

2h2q	TCDHFR-TS PROTEIN IN FOLATE-FREE STATE
3cl9	TCDHFR-TS PROTEIN IN COMPLEX WITH MTX
3clb	TCDHFR-TS PROTEIN IN COMPLEX WITH TMQ (OLDER REFINEMENT)
3hbb	TCDHFR-TS PROTEIN IN COMPLEX WITH TMQ
3inv	TCDHFR-TS PROTEIN IN COMPLEX WITH NADPH, DUMP AND C-448 ANTIFOLATE
3irn	TCDHFR-TS PROTEIN IN COMPLEX WITH NADPH AND CYCLOGUANIL
3iro	TCDHFR-TS PROTEIN IN COMPLEX WITH NADPH NADPH AND Q-8 ANTIFOLATE

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 20)

Sites (20, 20)

SS Bonds (0, 0)

Cis Peptide Bonds (12, 12)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (3, 12)

Exons (0, 0)

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SCOP Domains (0, 0)

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Gene Ontology (14, 14)

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