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(-) Description

Title :  CRYSTAL STRUCTURE OF CYSTEINE PROTEASE INHIBITOR, CHAGASIN, IN COMPLEX WITH HUMAN CATHEPSIN L
 
Authors :  I. Redzynia, G. Bujacz, A. Ljunggren, M. Jaskolski, M. Abrahamson
Date :  31 Oct 06  (Deposition) - 24 Jul 07  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.75
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Chagasin-Cathepsin L Complex, Three Prong Inhibition Mode, Hydrolase Inhibitor-Hydrolase Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  A. Ljunggren, I. Redzynia, M. Alvarez-Fernandez, M. Abrahamson, J. S. Mort, J. C. Krupa, M. Jaskolski, G. Bujacz
Crystal Structure Of The Parasite Protease Inhibitor Chagasin In Complex With A Host Target Cysteine Protease
J. Mol. Biol. V. 371 137 2007
PubMed-ID: 17561110  |  Reference-DOI: 10.1016/J.JMB.2007.05.005

(-) Compounds

Molecule 1 - CHAGASIN
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21
    Expression System PlasmidPGEX-6P-1
    Expression System StrainBL21
    Expression System Taxid511693
    Expression System Vector TypePLASMID
    Organism ScientificTRYPANOSOMA CRUZI
    Organism Taxid5693
    SynonymCYSTEINE PROTEASE INHIBITOR
 
Molecule 2 - CATHEPSIN L
    ChainsB
    EC Number3.4.22.15
    EngineeredYES
    Expression SystemPICHIA PASTORIS
    Expression System PlasmidPPIC9
    Expression System StrainGS115
    Expression System Taxid4922
    Expression System Vector TypePLASMID
    FragmentRESIDUES 1-220
    MutationYES
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymCYSTEINE PROTEASE, MAJOR EXCRETED PROTEIN, MEP

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

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

Asymmetric/Biological Unit (4, 4)
No.NameCountTypeFull Name
1CL1Ligand/IonCHLORIDE ION
2NA1Ligand/IonSODIUM ION
3NAG1Ligand/IonN-ACETYL-D-GLUCOSAMINE
4NDG1Ligand/Ion2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWARESER A:62 , HOH A:585 , HOH A:586 , HOH A:655 , HOH B:1087 , HOH B:1090BINDING SITE FOR RESIDUE NA A 565
2AC2SOFTWARESER B:105 , ASN B:108 , NAG B:222 , HOH B:1226 , HOH B:1357 , HOH B:1361 , HOH B:1375BINDING SITE FOR RESIDUE NDG B 221
3AC3SOFTWARENDG B:221BINDING SITE FOR RESIDUE NAG B 222
4AC4SOFTWAREALA A:67 , GLY A:68 , ASN B:66 , HOH B:1276 , HOH B:1393BINDING SITE FOR RESIDUE CL B 1001

(-) SS Bonds  (3, 3)

Asymmetric/Biological Unit
No.Residues
1B:22 -B:65
2B:56 -B:98
3B:156 -B:209

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2NQD)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2NQD)

(-) PROSITE Motifs  (3, 3)

Asymmetric/Biological Unit (3, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CATL1_HUMAN132-143  1B:19-30
2THIOL_PROTEASE_HISPS00639 Eukaryotic thiol (cysteine) proteases histidine active site.CATL1_HUMAN274-284  1B:161-171
3THIOL_PROTEASE_ASNPS00640 Eukaryotic thiol (cysteine) proteases asparagine active site.CATL1_HUMAN295-314  1B:182-201

(-) Exons   (5, 5)

Asymmetric/Biological Unit (5, 5)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1aENST000003431501aENSE00001886667chr9:90340434-90341313880CATL1_HUMAN-00--
1.2bENST000003431502bENSE00002159545chr9:90342509-90342644136CATL1_HUMAN1-42420--
1.3aENST000003431503aENSE00001686191chr9:90342942-90343064123CATL1_HUMAN43-83410--
1.4ENST000003431504ENSE00001692924chr9:90343165-90343311147CATL1_HUMAN84-132491B:1P-1920
1.5aENST000003431505aENSE00000917752chr9:90343500-90343724225CATL1_HUMAN133-207751B:20-9475
1.6bENST000003431506bENSE00000917753chr9:90344488-90344650163CATL1_HUMAN208-262551B:95-14955
1.7ENST000003431507ENSE00001618315chr9:90345296-90345413118CATL1_HUMAN262-301401B:149-18840
1.8cENST000003431508cENSE00001931704chr9:90345923-90346307385CATL1_HUMAN301-333331B:188-22033

(-) Sequences/Alignments

Asymmetric/Biological 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:109
 aligned with CHAG_TRYCR | Q966X9 from UniProtKB/Swiss-Prot  Length:110

    Alignment length:109
                                    11        21        31        41        51        61        71        81        91       101         
           CHAG_TRYCR     2 SHKVTKAHNGATLTVAVGELVEIQLPSNPTTGFAWYFEGGTKESPNESMFTVENKYFPPDSKLLGAGGTEHFHVTVKAAGTHAVNLTYMRPWTGPSHDSERFTVYLKAN 110
               SCOP domains d2nqda_ A: Chagasin                                                                                           SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------Inhibitor_I42-2nqdA01 A:14-109                                                                  - Pfam domains
         Sec.struct. author ..eehhhhh..eee.....eeeeeeeehhhhh.eee.............eeeeeeee..........eeeeeeeee...eeeeeeeeee...........eeeeeeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------- Transcript
                 2nqd A   2 SHKVTKAHNGATLTVAVGELVEIQLPSNPTTGFAWYFEGGTKESPNESMFTVENKYFPPDSKLLGAGGTEHFHVTVKAAGTHAVNLTYMRPWTGPSHDSERFTVYLKAN 110
                                    11        21        31        41        51        61        71        81        91       101         

Chain B from PDB  Type:PROTEIN  Length:221
 aligned with CATL1_HUMAN | P07711 from UniProtKB/Swiss-Prot  Length:333

    Alignment length:221
                                   122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332 
          CATL1_HUMAN   113 EAPRSVDWREKGYVTPVKNQGQCGSCWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFESTESDNNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 333
               SCOP domains d2nqdb_ B: automated matches                                                                                                                                                                                                  SCOP domains
               CATH domains 2nqdB00 B:1P-220 Cysteine proteinases                                                                                                                                                                                         CATH domains
               Pfam domains -Peptidase_C1-2nqdB01 B:1-219                                                                                                                                                                                               - Pfam domains
         Sec.struct. author .....ee.hhhh............hhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhh.hhhhh.hhhhhhhhhhhhh.ee................hhh.eee....eee...hhhhhhhhhhhhh.eeeee...hhhhhh....ee...........eeeeeeeeee........eeeeee...........eeeee....hhhhh....eee.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------THIOL_PROTEA----------------------------------------------------------------------------------------------------------------------------------THIOL_PROTE----------THIOL_PROTEASE_ASN  ------------------- PROSITE
           Transcript 1 (1) Exon 1.4            Exon 1.5a  PDB: B:20-94 UniProt: 133-207                                   Exon 1.6b  PDB: B:95-149 UniProt: 208-262              --------------------------------------Exon 1.8c  PDB: B:188-220         Transcript 1 (1)
           Transcript 1 (2) -----------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.7  PDB: B:149-188                -------------------------------- Transcript 1 (2)
                 2nqd B  1P EAPRSVDWREKGYVTPVKNQGQCGSAWAFSATGALEGQMFRKTGRLISLSEQNLVDCSGPQGNEGCNGGLMDYAFQYVQDNGGLDSEESYPYEATEESCKYNPKYSVANDTGFVDIPKQEKALMKAVATVGPISVAIDAGHESFLFYKEGIYFEPDCSSEDMDHGVLVVGYGFESTESDNNKYWLVKNSWGEEWGMGGYVKMAKDRRNHCGIASAASYPTV 220
                            |        9        19        29        39        49        59        69        79        89        99       109       119       129       139       149       159       169       179       189       199       209       219 
                            |                                                                                                                                                                                                                            
                           1P                                                                                                                                                                                                                            

   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  (2, 2)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (2, 2)

Asymmetric/Biological Unit

(-) Gene Ontology  (35, 35)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (CHAG_TRYCR | Q966X9)
molecular function
    GO:0004869    cysteine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of a cysteine-type endopeptidase, any enzyme that hydrolyzes peptide bonds in polypeptides by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
biological process
    GO:0010951    negative regulation of endopeptidase activity    Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
    GO:0010466    negative regulation of peptidase activity    Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins.
cellular component
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0020016    ciliary pocket    Invagination of the plasma membrane from which a cilium (also called flagellum) protrudes.
    GO:0031410    cytoplasmic vesicle    A vesicle found in the cytoplasm of a cell.

Chain B   (CATL1_HUMAN | P07711)
molecular function
    GO:0005518    collagen binding    Interacting selectively and non-covalently with collagen, a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals. Collagen is highly enriched in glycine (some regions are 33% glycine) and proline, occurring predominantly as 3-hydroxyproline (about 20%).
    GO:0004197    cysteine-type endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0008234    cysteine-type peptidase activity    Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0001968    fibronectin binding    Interacting selectively and non-covalently with a fibronectin, a group of related adhesive glycoproteins of high molecular weight found on the surface of animal cells, connective tissue matrices, and in extracellular fluids.
    GO:0042393    histone binding    Interacting selectively and non-covalently with a histone, any of a group of water-soluble proteins found in association with the DNA of eukaroytic chromosomes. They are involved in the condensation and coiling of chromosomes during cell division and have also been implicated in nonspecific suppression of gene activity.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0043394    proteoglycan binding    Interacting selectively and non-covalently with a proteoglycan, any glycoprotein in which the carbohydrate units are glycosaminoglycans.
    GO:0004252    serine-type endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
    GO:0097655    serpin family protein binding    Interacting selectively and non-covalently with any member of the serpin protein family (serine protease inhibitors or classified inhibitor family I4). Serpins are a broadly distributed family of protease inhibitors that use a conformational change to inhibit target enzymes. They are central in controlling many important proteolytic cascades. The majority of serpins inhibit serine proteases, but serpins that inhibit caspases and papain-like cysteine proteases have also been identified. Rarely, serpins perform a non-inhibitory function; for example, several human serpins function as hormone transporters and certain serpins function as molecular chaperones or tumor suppressors.
biological process
    GO:0002250    adaptive immune response    An immune response mediated by cells expressing specific receptors for antigen produced through a somatic diversification process, and allowing for an enhanced secondary response to subsequent exposures to the same antigen (immunological memory).
    GO:0019882    antigen processing and presentation    The process in which an antigen-presenting cell expresses antigen (peptide or lipid) on its cell surface in association with an MHC protein complex.
    GO:0019886    antigen processing and presentation of exogenous peptide antigen via MHC class II    The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class II protein complex. The peptide antigen is typically, but not always, processed from a whole protein.
    GO:0097067    cellular response to thyroid hormone stimulus    A change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a thyroid hormone stimulus.
    GO:0030574    collagen catabolic process    The proteolytic chemical reactions and pathways resulting in the breakdown of collagen in the extracellular matrix, usually carried out by proteases secreted by nearby cells.
    GO:0022617    extracellular matrix disassembly    A process that results in the breakdown of the extracellular matrix.
    GO:0071888    macrophage apoptotic process    Any apoptotic process in a macrophage, a mononuclear phagocyte present in a variety of tissues.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0051603    proteolysis involved in cellular protein catabolic process    The hydrolysis of a peptide bond or bonds within a protein as part of the chemical reactions and pathways resulting in the breakdown of a protein by individual cells.
    GO:0002224    toll-like receptor signaling pathway    Any series of molecular signals generated as a consequence of binding to a toll-like receptor. Toll-like receptors directly bind pattern motifs from a variety of microbial sources to initiate innate immune response.
cellular component
    GO:0036021    endolysosome lumen    The volume enclosed by the membrane of an endolysosome. An endolysosome is a transient hybrid organelle formed by fusion of a late endosome with a lysosome.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
    GO:0005615    extracellular space    That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
    GO:0043202    lysosomal lumen    The volume enclosed within the lysosomal membrane.
    GO:0005764    lysosome    A small lytic vacuole that has cell cycle-independent morphology and is found in most animal cells and that contains a variety of hydrolases, most of which have their maximal activities in the pH range 5-6. The contained enzymes display latency if properly isolated. About 40 different lysosomal hydrolases are known and lysosomes have a great variety of morphologies and functions.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CATL1_HUMAN | P077111cjl 1cs8 1icf 1mhw 2vhs 2xu1 2xu3 2xu4 2xu5 2yj2 2yj8 2yj9 2yjb 2yjc 3bc3 3h89 3h8b 3h8c 3hha 3hwn 3iv2 3k24 3kse 3of8 3of9 4axl 4axm 5f02 5i4h 5mae 5maj 5mqy
        CHAG_TRYCR | Q966X92fo8 2h7w 2nnr 2oul 3cbj 3cbk 3e1z

(-) Related Entries Specified in the PDB File

1cs8 CRYSTAL STRUCTURE OF PROCATHEPSIN L
1icf CRYSTAL STRUCTURE OF MHC CLASS II ASSOCIATED P41 II FRAGMENT IN COMPLEX WITH CATHEPSIN L
2h7w CRYSTAL STRUCTURE OF CHAGASIN FROM TRYPANOSOMA CRUZI
2nnr CRYSTAL STRUCTURE OF CHAGASIN, CYSTEINE PROTEASE INHIBITOR FROM TRYPANOSOMA CRUZI