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(-) Description

Title :  INHIBITOR CYSTINE KNOT PROTEIN MCOEETI FUSED TO THE CATALYTICALLY INACTIVE BARNASE MUTANT H102A
 
Authors :  H. H. Niemann, H. U. Schmoldt, A. Wentzel, H. Kolmar, D. W. Heinz
Date :  18 Oct 05  (Deposition) - 21 Nov 05  (Release) - 15 Mar 17  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.30
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Squash Inhibitor, Hybrid Microprotein, Fusion Protein, Ribonuclease, Endonuclease, Hydrolase, Nuclease, Protease Inhibitor, Serine Protease Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  H. H. Niemann, H. U. Schmoldt, A. Wentzel, H. Kolmar, D. W. Heinz
Barnase Fusion As A Tool To Determine The Crystal Structure Of The Small Disulfide-Rich Protein Mcoeeti.
J. Mol. Biol. V. 356 1 2006
PubMed-ID: 16337652  |  Reference-DOI: 10.1016/J.JMB.2005.11.005

(-) Compounds

Molecule 1 - BARNASE MCOEETI FUSION
    Chains: A, B
    EC Number: 3.1.27.3
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PBAR100
    Expression System Strain: 71-18
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Mutation: YES
    Organism Scientific: BACILLUS AMYLOLIQUEFACIENS, MOMORDICA COCHINCHINENSIS, ECBALLIUM ELATERIUM
    Organism Taxid: 1390, 3674, 3679
    Other Details: MCOEETI IS A HYBRID OF MCOTI-II AND EETI-II. IT WAS FUSED C-TERMINALLY TO THE H102A MUTANT OF BARNASE WITH A 4-RESIDUE LINKER
    Other Details - Source: MCOEETI IS A DESIGNED HYBRID CARRYING SEQUENCE DERIVED FROM MOMORDICA COCHINCHINENSIS MCOTI-II AND ECBALLIUM ELATERIUM EETI-II

 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  (7, 51)

Asymmetric Unit (7, 51)
No.NameCountTypeFull Name
12PE4Ligand/IonNONAETHYLENE GLYCOL
2EDO10Ligand/Ion1,2-ETHANEDIOL
3FMT3Ligand/IonFORMIC ACID
4GOL1Ligand/IonGLYCEROL
5MES1Ligand/Ion2-(N-MORPHOLINO)-ETHANESULFONIC ACID
6SO417Ligand/IonSULFATE ION
7UNX15Ligand/IonUNKNOWN ATOM OR ION
Biological Unit 1 (6, 31)
No.NameCountTypeFull Name
12PE2Ligand/IonNONAETHYLENE GLYCOL
2EDO4Ligand/Ion1,2-ETHANEDIOL
3FMT2Ligand/IonFORMIC ACID
4GOL1Ligand/IonGLYCEROL
5MES-1Ligand/Ion2-(N-MORPHOLINO)-ETHANESULFONIC ACID
6SO47Ligand/IonSULFATE ION
7UNX15Ligand/IonUNKNOWN ATOM OR ION
Biological Unit 2 (5, 20)
No.NameCountTypeFull Name
12PE2Ligand/IonNONAETHYLENE GLYCOL
2EDO6Ligand/Ion1,2-ETHANEDIOL
3FMT1Ligand/IonFORMIC ACID
4GOL-1Ligand/IonGLYCEROL
5MES1Ligand/Ion2-(N-MORPHOLINO)-ETHANESULFONIC ACID
6SO410Ligand/IonSULFATE ION
7UNX-1Ligand/IonUNKNOWN ATOM OR ION

(-) Sites  (35, 35)

Asymmetric Unit (35, 35)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREPRO A:64 , GLY A:65 , ARG A:69 , HOH A:2241 , HOH A:2242 , HOH A:2243BINDING SITE FOR RESIDUE SO4 A 1159
02AC2SOFTWARELYS A:122 , LYS A:123 , HOH A:2244BINDING SITE FOR RESIDUE SO4 A 1160
03AC3SOFTWARELYS A:27 , ARG A:83 , TYR A:103 , HOH A:2245 , HOH A:2246 , HOH A:2247BINDING SITE FOR RESIDUE SO4 A 1161
04AC4SOFTWAREARG A:126BINDING SITE FOR RESIDUE SO4 A 1162
05AC5SOFTWARETHR A:70 , ARG A:72 , HOH A:2248 , HOH A:2249 , HOH A:2250BINDING SITE FOR RESIDUE SO4 A 1163
06AC6SOFTWAREVAL A:36 , ALA A:37 , SER A:38 , HOH A:2252 , HOH A:2253 , HOH A:2254 , HOH A:2255 , LYS B:66 , SER B:67BINDING SITE FOR RESIDUE SO4 A 1164
07AC7SOFTWAREALA A:37 , PHE A:82 , ARG A:83 , HOH A:2247 , HOH A:2256 , HOH A:2257BINDING SITE FOR RESIDUE SO4 A 1165
08AC8SOFTWAREHIS A:18 , ARG B:126 , HOH B:2190 , HOH B:2215BINDING SITE FOR RESIDUE SO4 B 1155
09AC9SOFTWARELYS A:39 , PRO B:64 , ARG B:69 , HOH B:2230 , HOH B:2231 , HOH B:2232BINDING SITE FOR RESIDUE SO4 B 1165
10BC1SOFTWARELYS B:122 , LYS B:123 , HOH B:2186 , HOH B:2233BINDING SITE FOR RESIDUE SO4 B 1166
11BC2SOFTWARELYS B:27 , ARG B:83 , TYR B:103 , HOH B:2234 , HOH B:2235 , HOH B:2236 , HOH B:2237BINDING SITE FOR RESIDUE SO4 B 1167
12BC3SOFTWAREARG B:126BINDING SITE FOR RESIDUE SO4 B 1168
13BC4SOFTWAREARG B:72 , HOH B:2240 , HOH B:2241BINDING SITE FOR RESIDUE SO4 B 1170
14BC5SOFTWARESER A:128 , HOH A:2214 , ARG B:126 , SER B:128 , HOH B:2246BINDING SITE FOR RESIDUE SO4 B 1173
15BC6SOFTWARECYS A:117 , PRO A:118 , LYS A:119 , ILE A:120 , CYS A:142 , SER A:144 , HOH A:2068 , HOH A:2081 , HOH A:2231 , LEU B:121 , ASN B:139 , PHE B:141 , CYS B:142BINDING SITE FOR RESIDUE 2PE A 1145
16BC7SOFTWAREGLN A:31 , LYS A:123 , CYS A:124 , ASN A:139 , GLY A:140 , HOH A:2233BINDING SITE FOR RESIDUE 2PE A 1146
17BC8SOFTWARETYR A:13 , LYS A:19BINDING SITE FOR RESIDUE EDO A 1153
18BC9SOFTWAREGLN A:15 , SER A:111 , SER A:112 , HOH A:2237BINDING SITE FOR RESIDUE EDO A 1155
19CC1SOFTWAREASN A:84 , SER A:85 , HOH A:2171BINDING SITE FOR RESIDUE EDO A 1156
20CC2SOFTWAREALA A:32 , GLY A:137 , PHE A:141 , CYS A:142 , GLY A:143 , MET B:114 , CYS B:117 , LYS B:119 , HOH B:2217 , HOH B:2218 , HOH B:2219 , HOH B:2220BINDING SITE FOR RESIDUE 2PE B 1156
21CC3SOFTWARETYR B:17 , ILE B:120 , LYS B:122 , LEU B:131 , EDO B:1159 , HOH B:2198 , HOH B:2222 , HOH B:2223BINDING SITE FOR RESIDUE 2PE B 1157
22CC4SOFTWARETYR B:13 , LYS B:19 , 2PE B:1157BINDING SITE FOR RESIDUE EDO B 1159
23CC5SOFTWARELYS B:98 , THR B:99 , THR B:100 , ASP B:101 , THR B:105 , THR B:107 , EDO B:1164BINDING SITE FOR RESIDUE EDO B 1160
24CC6SOFTWAREARG B:72 , SER B:92 , HOH B:2127 , HOH B:2227BINDING SITE FOR RESIDUE EDO B 1161
25CC7SOFTWAREPHE B:82 , ARG B:83 , ASN B:84 , HOH B:2142 , HOH B:2144 , HOH B:2228BINDING SITE FOR RESIDUE EDO B 1162
26CC8SOFTWAREASP B:12 , GLN B:15 , THR B:16 , HOH B:2034 , HOH B:2229BINDING SITE FOR RESIDUE EDO B 1163
27CC9SOFTWARELYS B:98 , THR B:107 , EDO B:1160BINDING SITE FOR RESIDUE EDO B 1164
28DC1SOFTWAREHOH A:2016 , HOH A:2018 , HOH A:2238 , HOH A:2239BINDING SITE FOR RESIDUE FMT A 1157
29DC2SOFTWAREARG A:72 , HOH A:2240BINDING SITE FOR RESIDUE FMT A 1158
30DC3SOFTWAREHOH B:2159 , HOH B:2171 , HOH B:2248 , HOH B:2249BINDING SITE FOR RESIDUE FMT B 1174
31DC4SOFTWARELYS A:98 , THR A:99 , THR A:100 , ASP A:101 , THR A:105 , THR A:107 , HOH A:2234Binding site for residues GOL A1148 and EDO A1154
32DC5SOFTWARETRP B:35 , ALA B:37 , GLY B:40 , PHE B:82 , ARG B:83 , ASN B:84 , SER B:85 , ARG B:87 , ALA B:102 , HOH B:2224 , HOH B:2225 , HOH B:2226 , HOH B:2238Binding site for residues MES B1158 and SO4 B1169
33DC6SOFTWARETRP B:35 , ALA B:37 , GLY B:40 , PHE B:82 , ARG B:83 , ASN B:84 , SER B:85 , ARG B:87 , ALA B:102 , HOH B:2224 , HOH B:2225 , HOH B:2226 , HOH B:2238Binding site for residues MES B1158 and SO4 B1169
34DC7SOFTWARETRP B:35 , ALA B:37 , GLY B:40 , PHE B:82 , ARG B:83 , ASN B:84 , SER B:85 , ARG B:87 , ALA B:102 , HOH B:2224 , HOH B:2225 , HOH B:2226 , HOH B:2238Binding site for residues MES B1158 and SO4 B1169
35DC8SOFTWAREGLY A:137 , PRO A:138 , ASN A:139 , GLY A:140 , LYS B:66 , SER B:67 , GLY B:68 , SER B:92 , MET B:114 , HOH B:2242 , HOH B:2243 , HOH B:2244 , HOH B:2245Binding site for residues SO4 B1171 and SO4 B1172

(-) SS Bonds  (6, 6)

Asymmetric Unit
No.Residues
1A:117 -A:134
2A:124 -A:136
3A:130 -A:142
4B:117 -B:134
5B:124 -B:136
6B:130 -B:142

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2C4B)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2C4B)

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SQUASH_INHIBITORPS00286 Squash family of serine protease inhibitors signature.ITR2_ECBEL2-21
 		  2A:117-136
B:117-136
ITR2_MOMCO8-27
 		  2A:117-136
B:117-136
Biological Unit 1 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SQUASH_INHIBITORPS00286 Squash family of serine protease inhibitors signature.ITR2_ECBEL2-21
 		  1A:117-136
-
ITR2_MOMCO8-27
 		  1A:117-136
-
Biological Unit 2 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SQUASH_INHIBITORPS00286 Squash family of serine protease inhibitors signature.ITR2_ECBEL2-21
 		  1-
B:117-136
ITR2_MOMCO8-27
 		  1-
B:117-136

(-) Exons   (0, 0)

(no "Exon" information available for 2C4B)

(-) 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:142
 aligned with ITR2_ECBEL | P12071 from UniProtKB/Swiss-Prot  Length:30

    Alignment length:142
                                                                                                                                            1 2                           
                                     -         -         -         -         -         -         -         -         -         -         -  | |    7        17        27  
           ITR2_ECBEL     - ----------------------------------------------------------------------------------------------------------------G-CPRILMRCKQDSDCLAGCVCGPNGFCGS  29
               SCOP domains d2c4ba1 A:3-110 Barnase                                                                                     ------d2c4ba2 A:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------SQUASH_INHIBITOR    -------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b A   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142  


Chain A from PDB  Type:PROTEIN  Length:142
 aligned with ITR2_MOMCO | P82409 from UniProtKB/Swiss-Prot  Length:34

    Alignment length:142
                                                                                             2                 4                                                          
                                                                                            1|                3|                           5                           34 
                                     -         -         -         -         -         -    ||   -         -  ||     -         -         - |      13        23        33| 
           ITR2_MOMCO     - ----------------------------------------------------------------SG----------------SD---------------------------GGVCPKILKKCRRDSDCPGACICRGNGYCG-   -
               SCOP domains d2c4ba1 A:3-110 Barnase                                                                                     ------d2c4ba2 A:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ------------------------------------------------------------------------------------------------------------------SQUASH_INHIBITOR    -------- PROSITE (2)
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b A   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142  


Chain A from PDB  Type:PROTEIN  Length:142
 aligned with RNBR_BACAM | P00648 from UniProtKB/Swiss-Prot  Length:157

    Alignment length:142
                                                                                                                                     157                                  
                                    59        69        79        89        99       109       119       129       139       149       | -         -         -         -  
           RNBR_BACAM    50 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDHYQTFTKIR----------------------------------   -
               SCOP domains d2c4ba1 A:3-110 Barnase                                                                                     ------d2c4ba2 A:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b A   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142  


Chain B from PDB  Type:PROTEIN  Length:142
 aligned with ITR2_ECBEL | P12071 from UniProtKB/Swiss-Prot  Length:30

    Alignment length:142
                                                                                                                                            1 2                           
                                     -         -         -         -         -         -         -         -         -         -         -  | |    7        17        27  
           ITR2_ECBEL     - ----------------------------------------------------------------------------------------------------------------G-CPRILMRCKQDSDCLAGCVCGPNGFCGS  29
               SCOP domains d2c4bb1 B:3-110 Barnase                                                                                     ------d2c4bb2 B:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------SQUASH_INHIBITOR    -------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b B   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142  


Chain B from PDB  Type:PROTEIN  Length:142
 aligned with ITR2_MOMCO | P82409 from UniProtKB/Swiss-Prot  Length:34

    Alignment length:142
                                                                                             2                 4                                                          
                                                                                            1|                3|                           5                           34 
                                     -         -         -         -         -         -    ||   -         -  ||     -         -         - |      13        23        33| 
           ITR2_MOMCO     - ----------------------------------------------------------------SG----------------SD---------------------------GGVCPKILKKCRRDSDCPGACICRGNGYCG-   -
               SCOP domains d2c4bb1 B:3-110 Barnase                                                                                     ------d2c4bb2 B:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ------------------------------------------------------------------------------------------------------------------SQUASH_INHIBITOR    -------- PROSITE (2)
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b B   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142  


Chain B from PDB  Type:PROTEIN  Length:142
 aligned with RNBR_BACAM | P00648 from UniProtKB/Swiss-Prot  Length:157

    Alignment length:142
                                                                                                                                     157                                  
                                    59        69        79        89        99       109       119       129       139       149       | -         -         -         -  
           RNBR_BACAM    50 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDHYQTFTKIR----------------------------------   -
               SCOP domains d2c4bb1 B:3-110 Barnase                                                                                     ------d2c4bb2 B:117-144            SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhh.....eehhhhhhhh..hhhhhhhhhhh...eeeeeee..............eeeee...........eeeee....eeee.......eeee...............hhhhh....ee.....ee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2c4b B   3 VINTFDGVADYLQTYHKLPDNYITKSEAQALGWVASKGNLADVAPGKSIGGDIFSNREGKLPGKSGRTWREADINYTSGFRNSDRILYSSDWLIYKTTDAYQTFTKIRSSSMGVCPKILKKCRRDSDCLAGCVCGPNGFCGS 144
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142
   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, 4)

Asymmetric Unit
(-)
Class: Alpha and beta proteins (a+b) (23004)
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2C4B)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2C4B)

(-) Gene Ontology  (15, 22)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (ITR2_ECBEL | P12071)
molecular function
    GO:0004866    endopeptidase inhibitor activity    Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
    GO:0004867    serine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme.
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: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.

Chain A,B   (RNBR_BACAM | P00648)
molecular function
    GO:0003723    RNA binding    Interacting selectively and non-covalently with an RNA molecule or a portion thereof.
    GO:0004519    endonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by creating internal breaks.
    GO:0004521    endoribonuclease activity    Catalysis of the hydrolysis of ester linkages within ribonucleic acid by creating internal breaks.
    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:0004518    nuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids.
    GO:0004540    ribonuclease activity    Catalysis of the hydrolysis of phosphodiester bonds in chains of RNA.
biological process
    GO:0090501    RNA phosphodiester bond hydrolysis    The RNA metabolic process in which the phosphodiester bonds between ribonucleotides are cleaved by hydrolysis.
    GO:0090502    RNA phosphodiester bond hydrolysis, endonucleolytic    The chemical reactions and pathways involving the hydrolysis of internal 3',5'-phosphodiester bonds in one or two strands of ribonucleotides.
    GO:0090305    nucleic acid phosphodiester bond hydrolysis    The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
cellular component
    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.

Chain A,B   (ITR2_MOMCO | P82409)
molecular function
    GO:0004866    endopeptidase inhibitor activity    Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
    GO:0004867    serine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme.
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: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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        ITR2_ECBEL | P12071: 1h9h 1h9i 1w7z 2eti 2it7 2let
        ITR2_MOMCO | P82409: 1ha9 1ib9 2it8 2mt8 2po8 4gux
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(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 2C4B)