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(-) Description

Title :  X-RAY STRUCTURE OF NIKA IN COMPLEX WITH FE-N,N'-BIS(2-PYRIDYLMETHYL)-N-CARBOXYMETHYL-N'-METHYL
 
Authors :  M. V. Cherrier, P. Amara, M. Iannello, C. Cavazza
Date :  05 Dec 12  (Deposition) - 17 Apr 13  (Release) - 17 Apr 13  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.70
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Transport Protein, Protein-Bound Iron Complex, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  C. Esmieu, M. V. Cherrier, P. Amara, E. Girgenti, C. Marchi-Delapierre, F. Oddon, M. Iannello, A. Jorge-Robin, C. Cavazza, S. Menage
An Artificial Oxygenase Built From Scratch: Substrate Binding Site Identified Using A Docking Approach.
Angew. Chem. Int. Ed. Engl. V. 52 3922 2013
PubMed-ID: 23440925  |  Reference-DOI: 10.1002/ANIE.201209021

(-) Compounds

Molecule 1 - NICKEL-BINDING PERIPLASMIC PROTEIN
    Chains: A, B
    EC Number: 3.6.3.24
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET22B
    Expression System Strain: BL21(DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PLASMID
    Gene: B3476, JW3441, NIKA
    Organism Scientific: ESCHERICHIA COLI
    Organism Taxid: 469008
    Strain: BL21(DE3)

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): A 
Biological Unit 2 (1x):  B

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (4, 50)

Asymmetric Unit (4, 50)
No.NameCountTypeFull Name
1ACT25Ligand/IonACETATE ION
2GOL21Ligand/IonGLYCEROL
3L4D2Ligand/Ion{(S)-N-(2-{METHYL[(PYRIDIN-2-YL-KAPPAN)METHYL]AMINO-KAPPAN}ETHYL)-N-[(PYRIDIN-2-YL-KAPPAN)METHYL]GLYCINATO-KAPPA~2~N,O}IRON(2+)
4SO42Ligand/IonSULFATE ION
Biological Unit 1 (4, 34)
No.NameCountTypeFull Name
1ACT18Ligand/IonACETATE ION
2GOL13Ligand/IonGLYCEROL
3L4D1Ligand/Ion{(S)-N-(2-{METHYL[(PYRIDIN-2-YL-KAPPAN)METHYL]AMINO-KAPPAN}ETHYL)-N-[(PYRIDIN-2-YL-KAPPAN)METHYL]GLYCINATO-KAPPA~2~N,O}IRON(2+)
4SO42Ligand/IonSULFATE ION
Biological Unit 2 (3, 16)
No.NameCountTypeFull Name
1ACT7Ligand/IonACETATE ION
2GOL8Ligand/IonGLYCEROL
3L4D1Ligand/Ion{(S)-N-(2-{METHYL[(PYRIDIN-2-YL-KAPPAN)METHYL]AMINO-KAPPAN}ETHYL)-N-[(PYRIDIN-2-YL-KAPPAN)METHYL]GLYCINATO-KAPPA~2~N,O}IRON(2+)
4SO4-1Ligand/IonSULFATE ION

(-) Sites  (50, 50)

Asymmetric Unit (50, 50)
No.NameEvidenceResiduesDescription
01AC1SOFTWARELYS A:52 , ARG A:68 , ASP A:69 , ASP A:70 , HOH A:1283BINDING SITE FOR RESIDUE ACT A 601
02AC2SOFTWAREASN A:261 , LEU A:263 , HOH A:757BINDING SITE FOR RESIDUE ACT A 602
03AC3SOFTWAREGLY A:219 , ASN A:220 , GLY A:222 , GOL A:610 , HOH A:881 , HOH A:1348BINDING SITE FOR RESIDUE GOL A 603
04AC4SOFTWARETHR A:441 , HIS A:442 , ASP A:443 , HOH A:1171BINDING SITE FOR RESIDUE SO4 A 604
05AC5SOFTWAREPHE A:147 , LYS A:148 , ASN A:149 , LYS A:157 , HOH A:884BINDING SITE FOR RESIDUE SO4 A 605
06AC6SOFTWAREARG A:89 , LEU A:92 , ARG A:95 , ILE A:107 , VAL A:108 , ASP A:109 , VAL A:110 , ASN A:281 , HOH A:943 , HOH A:946BINDING SITE FOR RESIDUE GOL A 606
07AC7SOFTWARESER A:53 , TRP A:54 , HOH A:797 , HOH A:1292BINDING SITE FOR RESIDUE ACT A 607
08AC8SOFTWARELYS A:330 , ASP A:331 , ARG A:365 , LYS B:148BINDING SITE FOR RESIDUE GOL A 608
09AC9SOFTWAREARG A:180 , LYS A:188 , LYS A:192BINDING SITE FOR RESIDUE GOL A 609
10BC1SOFTWAREASN A:220 , GLU A:247 , ARG A:396 , MET A:472 , ALA A:489 , THR A:490 , GOL A:603 , L4D A:631 , HOH A:906 , HOH A:955 , HOH A:1291BINDING SITE FOR RESIDUE GOL A 610
11BC2SOFTWARELYS A:123 , THR A:203 , GOL A:633 , HOH A:895 , HOH A:981 , HOH A:986 , HOH A:1067 , HOH A:1102 , HOH A:1219BINDING SITE FOR RESIDUE ACT A 611
12BC3SOFTWAREGLU A:221 , GLY A:222 , ASP A:350 , SER A:353 , ARG A:396 , HOH A:952 , HOH A:976 , HOH A:1001 , HOH A:1348BINDING SITE FOR RESIDUE GOL A 612
13BC4SOFTWAREPRO A:327 , ALA A:328 , ARG B:365 , HOH B:1189BINDING SITE FOR RESIDUE ACT A 613
14BC5SOFTWAREVAL A:273 , ASN A:274 , LYS A:275 , LYS A:276 , ASP A:291 , SER A:308 , GLN A:309 , TYR A:310 , HOH A:904 , HOH A:1089 , HOH A:1150 , HOH A:1192 , HOH A:1253 , HOH A:1282BINDING SITE FOR RESIDUE GOL A 614
15BC6SOFTWAREGLN A:361 , SER A:372 , LEU A:373 , HOH A:1026 , HOH A:1059BINDING SITE FOR RESIDUE ACT A 615
16BC7SOFTWARELEU A:430 , LYS A:433 , HOH A:828 , HOH A:1024 , HOH A:1333BINDING SITE FOR RESIDUE ACT A 616
17BC8SOFTWAREGLN A:313 , LYS A:316 , HOH A:1187 , HOH A:1298BINDING SITE FOR RESIDUE ACT A 617
18BC9SOFTWAREARG A:457 , HOH A:1204BINDING SITE FOR RESIDUE ACT A 618
19CC1SOFTWAREPRO A:296 , ASN A:302 , LEU A:303 , GLY A:304 , HOH A:709 , HOH A:991 , HOH A:1174 , HOH A:1316 , PHE B:229 , SER B:233 , LEU B:242BINDING SITE FOR RESIDUE GOL A 619
20CC2SOFTWAREASP A:453 , HOH A:856 , HOH A:1160BINDING SITE FOR RESIDUE ACT A 620
21CC3SOFTWAREGLN A:174 , ASN A:197 , VAL A:198 , HOH A:1025 , HOH A:1297BINDING SITE FOR RESIDUE ACT A 621
22CC4SOFTWARESER A:31 , MET A:32 , LYS A:39 , ALA A:486 , GLU A:491 , ILE A:492 , PRO A:493 , GLU A:495 , HOH A:715 , HOH A:851 , HOH A:1279BINDING SITE FOR RESIDUE GOL A 622
23CC5SOFTWARETYR A:271 , LYS A:306 , LYS A:314 , HOH A:753 , HOH A:1207BINDING SITE FOR RESIDUE ACT A 623
24CC6SOFTWARETHR A:23 , GLN A:26 , L4D A:631 , HOH A:772 , HOH A:1226 , HOH B:1110BINDING SITE FOR RESIDUE ACT A 624
25CC7SOFTWARELYS A:316 , HOH A:919 , LYS B:354BINDING SITE FOR RESIDUE ACT A 625
26CC8SOFTWAREGLU A:86 , ARG A:89 , PRO A:144 , PHE A:147 , HIS A:150 , HOH A:1017BINDING SITE FOR RESIDUE GOL A 626
27CC9SOFTWARELEU A:167 , GLN A:168 , HOH A:975 , HOH A:1311 , HOH A:1335 , VAL B:207 , THR B:211 , ASP B:213BINDING SITE FOR RESIDUE ACT A 627
28DC1SOFTWARELYS A:498 , VAL A:500 , HOH A:1314 , HIS B:56 , TRP B:63 , GOL B:611BINDING SITE FOR RESIDUE ACT A 628
29DC2SOFTWAREGLU A:479 , PRO A:499 , VAL A:500 , HOH A:1359BINDING SITE FOR RESIDUE ACT A 629
30DC3SOFTWAREARG A:68 , HOH A:1030BINDING SITE FOR RESIDUE ACT A 630
31DC4SOFTWARETYR A:22 , THR A:23 , MET A:27 , TRP A:100 , ARG A:137 , TRP A:398 , THR A:490 , GOL A:610 , ACT A:624 , HOH A:902 , HOH A:1226 , HOH A:1362 , HOH A:1363 , HOH A:1364 , HOH A:1365BINDING SITE FOR RESIDUE L4D A 631
32DC5SOFTWAREASN A:235 , ALA A:237 , PHE A:419 , GLN A:423 , PRO A:429 , HOH A:835 , HOH A:1289BINDING SITE FOR RESIDUE GOL A 632
33DC6SOFTWAREASN A:105 , ASP A:227 , THR A:228 , ARG A:231 , ACT A:611 , HOH A:1022 , HOH A:1087 , HOH A:1208 , HOH A:1296BINDING SITE FOR RESIDUE GOL A 633
34DC7SOFTWAREARG A:386 , HOH A:1273 , HOH A:1304 , HOH A:1339 , GLY B:304 , LEU B:305 , LYS B:306 , THR B:456 , HIS B:459 , ASP B:460 , HOH B:768 , HOH B:1199BINDING SITE FOR RESIDUE GOL A 634
35DC8SOFTWARETRP B:10 , PRO B:11 , GLY B:219 , ASN B:220 , GLY B:222 , LEU B:223 , GOL B:606 , HOH B:1098BINDING SITE FOR RESIDUE GOL B 601
36DC9SOFTWAREVAL B:273 , ASN B:274 , LYS B:275 , LYS B:276 , SER B:308 , GLN B:309 , TYR B:310 , HOH B:844 , HOH B:904 , HOH B:1011 , HOH B:1160BINDING SITE FOR RESIDUE GOL B 602
37EC1SOFTWAREARG B:389 , GOL B:616 , HOH B:1207BINDING SITE FOR RESIDUE ACT B 603
38EC2SOFTWAREGLU B:221 , VAL B:249 , SER B:353 , MET B:356 , PHE B:394 , HIS B:395 , ARG B:396 , HOH B:935 , HOH B:1007 , HOH B:1211BINDING SITE FOR RESIDUE GOL B 604
39EC3SOFTWARELYS A:354 , HIS B:150BINDING SITE FOR RESIDUE ACT B 605
40EC4SOFTWAREASN B:220 , GLU B:247 , ARG B:396 , ALA B:489 , THR B:490 , GOL B:601 , HOH B:965 , HOH B:979 , HOH B:1019BINDING SITE FOR RESIDUE GOL B 606
41EC5SOFTWAREARG A:384 , ARG A:389 , ASP B:427 , ARG B:457 , HOH B:954BINDING SITE FOR RESIDUE ACT B 607
42EC6SOFTWARELYS A:335 , ARG B:341 , HOH B:1109 , HOH B:1134BINDING SITE FOR RESIDUE ACT B 608
43EC7SOFTWAREARG A:97 , HOH A:1014 , HOH A:1276 , LYS B:306 , LYS B:314 , HOH B:991 , HOH B:1035 , HOH B:1173BINDING SITE FOR RESIDUE ACT B 609
44EC8SOFTWAREASP B:4 , GLU B:5BINDING SITE FOR RESIDUE GOL B 610
45EC9SOFTWAREVAL A:500 , ACT A:628 , TRP B:63 , ALA B:125 , TYR B:126 , TYR B:127 , HOH B:880BINDING SITE FOR RESIDUE GOL B 611
46FC1SOFTWARETHR B:23 , PRO B:24 , GLN B:26 , HOH B:1051BINDING SITE FOR RESIDUE ACT B 612
47FC2SOFTWARETYR B:22 , THR B:23 , MET B:27 , TRP B:100 , ARG B:137 , TRP B:398 , THR B:490 , ACT B:615 , HOH B:950 , HOH B:1183 , HOH B:1230 , HOH B:1231 , HOH B:1232BINDING SITE FOR RESIDUE L4D B 613
48FC3SOFTWAREGLU A:187 , LYS B:52 , SER B:53 , TRP B:54 , HOH B:1107BINDING SITE FOR RESIDUE GOL B 614
49FC4SOFTWAREGLN B:385 , HIS B:416 , ALA B:417 , L4D B:613 , HOH B:1135BINDING SITE FOR RESIDUE ACT B 615
50FC5SOFTWARELYS B:257 , GLU B:343 , SER B:345 , ARG B:384 , ARG B:389 , PHE B:390 , GLY B:391 , ACT B:603 , HOH B:977 , HOH B:1208BINDING SITE FOR RESIDUE GOL B 616

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 4I9D)

(-) Cis Peptide Bonds  (10, 10)

Asymmetric Unit
No.Residues
1Thr A:23 -Pro A:24
2Arg A:137 -Pro A:138
3Ala A:258 -Pro A:259
4Ala A:400 -Pro A:401
5Asp A:403 -Pro A:404
6Thr B:23 -Pro B:24
7Arg B:137 -Pro B:138
8Ala B:258 -Pro B:259
9Ala B:400 -Pro B:401
10Asp B:403 -Pro B:404

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 4I9D)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 4I9D)

(-) Exons   (0, 0)

(no "Exon" information available for 4I9D)

(-) Sequences/Alignments

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:498
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
               SCOP domains d4i9da_ A: Nickel-binding periplasmic protein NikA                                                                                                                                                                                                                                                                                                                                                                                                                                                                 SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ..eeeeee...............hhhhhhhhh...eee.....eee..eeeeee.....eeeeee............hhhhhhhhhhhhhhhhhhhh.hhhhhheeeeee....eeeeee.....hhhhhhh........hhh.ee..eeeeee........eeeeeee...eeeeee............eeeeee..hhhhhhhhhhh....eeee.....hhhhhhhhhhh...eeeeeeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhh....ee.....................hhhhhhhhhhhh...........ee..ee.eeeeeee..hhhhhhhhhhhhhhhhhh..eeeeeeehhhhhhhhhhhh...eeeee.......hhhhhhhhhh..hhhhhhh....hhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeee.hhhh...........hhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 4i9d A   3 PDEITTAWPVNVGPLNPHLYTPNQMFAQSMVYEPLVKYQADGSVIPWLAKSWTHSEDGKTWTFTLRDDVKFSNGEPFDAEAAAENFRAVLDNRQRHAWLELANQIVDVKALSKTELQITLKSAYYPFLQELALPRPFRFIAPSQFKNHETMNGIKAPIGTGPWILQESKLNQYDVFVRNENYWGEKPAIKKITFNVIPDPTTRAVAFETGDIDLLYGNEGLLPLDTFARFSQNPAYHTQLSQPIETVMLALNTAKAPTNELAVREALNYAVNKKSLIDNALYGTQQVADTLFAPSVPYANLGLKPSQYDPQKAKALLEKAGWTLPAGKDIREKNGQPLRIELSFIGTDALSKSMAEIIQADMRQIGADVSLIGEEESSIYARQRDGRFGMIFHRTWGAPYDPHAFLSSMRVPSHADFQAQQGLADKPLIDKEIGEVLATHDETQRQALYRDILTRLHDEAVYLPISYISMMVVSKPELGNIPYAPIATEIPFEQIKPV 500
                                    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        


Chain B from PDB  Type:PROTEIN  Length:497
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
               SCOP domains d4i9db_ B: Nickel-binding periplasmic protein NikA                                                                                                                                                                                                                                                                                                                                                                                                                                                                SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeee...............hhhhhhhhh...eee.....eee..eeeeee.....eeeeee............hhhhhhhhhhhhhhhhhhhh.hhhhhheeeeee....eeeeee.....hhhhhhh........hhh.ee..eeeeee........eeeeeee...eeeeee............eeeeee..hhhhhhhhhhh....eeee.....hhhhhhhhhh....eeeeeeeeeeeeeee........hhhhhhhhhhhhhhhhhhhh......ee.....................hhhhhhhhhhhh...........ee..ee.eeeeeee..hhhhhhhhhhhhhhhhh...eeeeeeehhhhhhhhhhhh...eeeee.......hhhhhhhh....hhhhhhh....hhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhh..eeeeeeeeeeeee.hhhh...........hhhhh... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 4i9d B   4 DEITTAWPVNVGPLNPHLYTPNQMFAQSMVYEPLVKYQADGSVIPWLAKSWTHSEDGKTWTFTLRDDVKFSNGEPFDAEAAAENFRAVLDNRQRHAWLELANQIVDVKALSKTELQITLKSAYYPFLQELALPRPFRFIAPSQFKNHETMNGIKAPIGTGPWILQESKLNQYDVFVRNENYWGEKPAIKKITFNVIPDPTTRAVAFETGDIDLLYGNEGLLPLDTFARFSQNPAYHTQLSQPIETVMLALNTAKAPTNELAVREALNYAVNKKSLIDNALYGTQQVADTLFAPSVPYANLGLKPSQYDPQKAKALLEKAGWTLPAGKDIREKNGQPLRIELSFIGTDALSKSMAEIIQADMRQIGADVSLIGEEESSIYARQRDGRFGMIFHRTWGAPYDPHAFLSSMRVPSHADFQAQQGLADKPLIDKEIGEVLATHDETQRQALYRDILTRLHDEAVYLPISYISMMVVSKPELGNIPYAPIATEIPFEQIKPV 500
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283       293       303       313       323       333       343       353       363       373       383       393       403       413       423       433       443       453       463       473       483       493
   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 '|'

 Classification and Annotation

(-) SCOP Domains  (1, 2)

Asymmetric Unit
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 4I9D)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 4I9D)

(-) Gene Ontology  (12, 12)

Asymmetric Unit(hide GO term definitions)

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  Cis Peptide Bonds
    Ala A:258 - Pro A:259   [ RasMol ]  
    Ala A:400 - Pro A:401   [ RasMol ]  
    Ala B:258 - Pro B:259   [ RasMol ]  
    Ala B:400 - Pro B:401   [ RasMol ]  
    Arg A:137 - Pro A:138   [ RasMol ]  
    Arg B:137 - Pro B:138   [ RasMol ]  
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        NIKA_ECOLI | P33590: 1uiu 1uiv 1zlq 2noo 3dp8 3e3k 3mvw 3mvx 3mvy 3mvz 3mw0 3mz9 3mzb 3qim 4dcx 4dcy 4i8c 5l8d 5mwu

(-) Related Entries Specified in the PDB File

4dcx X-RAY STRUCTURE OF NIKA IN COMPLEX WITH FE(1R,2R)-N,N'- BIS(2-PYRIDYLMETHYL)-N,N'-DICARBOXYMETHYL-1,2- CYCLOHEXANEDIAMINE
4dcy X-RAY STRUCTURE OF NIKA IN COMPLEX WITH FE(1S,2S)-N,N'- BIS(2-PYRIDYLMETHYL)-N-CARBOXYMETHYL-N'-METHYL-1,2- CYCLOHEXANEDIAMINE