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Title :   H. INFLUENZAE BETA-CARBONIC ANHYDRASE, VARIANT V47A WITH 100 MM BICARBONATE

Authors :   R. S. Rowlett, M. Mysliwiec

Date :   07 Aug 08 (Deposition) - 18 Aug 09 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.30

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

Keywords :   Beta Carbonic Anhydrase, Allosteric Site Mutant, Lyase, Metal-Binding (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   R. S. Rowlett, K. M. Hoffmann, H. Failing, M. M. Mysliwiec, D. Samardzi
Evidence For A Bicarbonate "Escort" Site In Haemophilus Influenzae Beta-Carbonic Anhydrase .
Biochemistry V. 49 3640 2010
PubMed-ID: 20359198 | Reference-DOI: 10.1021/BI100328J

Molecule 1 - CARBONIC ANHYDRASE 2
	Chains	:	A, B
	EC Number	:	4.2.1.1
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PTRC99
	Expression System Strain	:	JM109
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Gene	:	CAN, HI1301
	Mutation	:	YES
	Organism Scientific	:	HAEMOPHILUS INFLUENZAE
	Organism Taxid	:	727
	Synonym	:	CARBONATE DEHYDRATASE 2; BETA CARBONIC ANHYDRASE

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

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 7)

No.	Name	Count	Type	Full Name
1	BCT	5	Ligand/Ion	BICARBONATE ION
2	ZN	2	Ligand/Ion	ZINC ION

Biological Unit 1 (1, 10)

No.	Name	Count	Type	Full Name
1	BCT	10	Ligand/Ion	BICARBONATE ION
2	ZN	-1	Ligand/Ion	ZINC ION

Asymmetric Unit (7, 7)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	CYS A:42 , ASP A:44 , HIS A:98 , CYS A:101	BINDING SITE FOR RESIDUE ZN A 230
2	AC2	SOFTWARE	PRO A:48 , ALA A:49 , GLU A:50 , ARG A:64 , HOH A:258 , ARG B:64	BINDING SITE FOR RESIDUE BCT A 231
3	AC3	SOFTWARE	TRP A:39 , GLY A:41 , SER A:45 , ARG A:46 , ALA A:47 , PRO A:48 , ALA A:49 , LEU A:52 , ARG A:64 , HOH A:240	BINDING SITE FOR RESIDUE BCT A 232
4	AC4	SOFTWARE	ARG A:160 , LYS A:165 , ARG A:198 , HOH A:261 , LEU B:121 , ARG B:124	BINDING SITE FOR RESIDUE BCT A 233
5	AC5	SOFTWARE	ARG A:124 , HOH A:273 , HOH A:277 , ARG B:160 , LYS B:165 , ARG B:198	BINDING SITE FOR RESIDUE BCT A 234
6	AC6	SOFTWARE	CYS B:42 , ASP B:44 , HIS B:98 , CYS B:101	BINDING SITE FOR RESIDUE ZN B 230
7	AC7	SOFTWARE	TRP B:39 , SER B:45 , ARG B:46 , ALA B:47 , ARG B:64 , HOH B:238 , HOH B:267	BINDING SITE FOR RESIDUE BCT B 231

(no "SS Bond" information available for 3E3F)

(no "Cis Peptide Bond" information available for 3E3F)

(no "SAP(SNP)/Variant" information available for 3E3F)

Asymmetric Unit (2, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PROK_CO2_ANHYDRASE_1	PS00704	Prokaryotic-type carbonic anhydrases signature 1.	CAN_HAEIN	42-49	2	A:42-49 B:42-49
2	PROK_CO2_ANHYDRASE_2	PS00705	Prokaryotic-type carbonic anhydrases signature 2.	CAN_HAEIN	82-102	2	A:82-102 B:82-102

Biological Unit 1 (2, 8)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PROK_CO2_ANHYDRASE_1	PS00704	Prokaryotic-type carbonic anhydrases signature 1.	CAN_HAEIN	42-49	4	A:42-49 B:42-49
2	PROK_CO2_ANHYDRASE_2	PS00705	Prokaryotic-type carbonic anhydrases signature 2.	CAN_HAEIN	82-102	4	A:82-102 B:82-102

(no "Exon" information available for 3E3F)

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)
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Chain A from PDB  Type:PROTEIN  Length:182
 aligned with CAN_HAEIN | P45148 from UniProtKB/Swiss-Prot  Length:229

    Alignment length:182
                                    43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213  
            CAN_HAEIN    34 TPHYLWIGCSDSRVPAEKLTNLEPGELFVHRNVANQVIHTDFNCLSVVQYAVDVLKIEHIIICGHTNCGGIHAAMADKDLGLINNWLLHIRDIWFKHGHLLGKLSPEKRADMLTKINVAEQVYNLGRTSIVKSAWERGQKLSLHGWVYDVNDGFLVDQGVMATSRETLEISYRNAIARLSIL 215
               SCOP domains d3e3fa_ A: automated matches                                                                                                                                                           SCOP domains
               CATH domains 3e3fA00 A:34-215 Beta-carbonic Anhydrase; Chain A                                                                                                                                      CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeeeee.....hhhhhh......eeeeee........hhhhhhhhhhhhhh....eeeeeee..hhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeeeeee...ee......ee.hhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------PROK_CO2--------------------------------PROK_CO2_ANHYDRASE_2 ----------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3e3f A  34 TPHYLWIGCSDSRAPAEKLTNLEPGELFVHRNVANQVIHTDFNCLSVVQYAVDVLKIEHIIICGHTNCGGIHAAMADKDLGLINNWLLHIRDIWFKHGHLLGKLSPEKRADMLTKINVAEQVYNLGRTSIVKSAWERGQKLSLHGWVYDVNDGFLVDQGVMATSRETLEISYRNAIARLSIL 215
                                    43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213

Chain B from PDB  Type:PROTEIN  Length:183
 aligned with CAN_HAEIN | P45148 from UniProtKB/Swiss-Prot  Length:229

    Alignment length:183
                                    43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213   
            CAN_HAEIN    34 TPHYLWIGCSDSRVPAEKLTNLEPGELFVHRNVANQVIHTDFNCLSVVQYAVDVLKIEHIIICGHTNCGGIHAAMADKDLGLINNWLLHIRDIWFKHGHLLGKLSPEKRADMLTKINVAEQVYNLGRTSIVKSAWERGQKLSLHGWVYDVNDGFLVDQGVMATSRETLEISYRNAIARLSILD 216
               SCOP domains d3e3fb_ B: automated matches                                                                                                                                                            SCOP domains
               CATH domains 3e3fB00 B:34-216 Beta-carbonic Anhydrase; Chain A                                                                                                                                       CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeeeee.....hhhhhh......eeeeee........hhhhhhhhhhhhhh....eeeeeee..hhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeeeeee....eeeeeeeee.hhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------PROK_CO2--------------------------------PROK_CO2_ANHYDRASE_2 ------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3e3f B  34 TPHYLWIGCSDSRAPAEKLTNLEPGELFVHRNVANQVIHTDFNCLSVVQYAVDVLKIEHIIICGHTNCGGIHAAMADKDLGLINNWLLHIRDIWFKHGHLLGKLSPEKRADMLTKINVAEQVYNLGRTSIVKSAWERGQKLSLHGWVYDVNDGFLVDQGVMATSRETLEISYRNAIARLSILD 216
                                    43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
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	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 '\|'

Asymmetric Unit

Classes(

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Folds(

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Superfamilies( (-)

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Families(

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Protein Domains( (-)

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Organisms( (-)

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

Fold: Resolvase-like (37)

Superfamily: beta-carbonic anhydrase, cab (26)

Family: beta-carbonic anhydrase, cab (22)

Protein domain: automated matches (16)

Haemophilus influenzae [TaxId: 727] (14)

1a	d3e3fa_	A:
1b	d3e3fb_	B:

Asymmetric Unit

Classes(

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Architectures( (-)

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Topologies( (-)

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Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: 3-Layer(aba) Sandwich (12045)

Topology: Beta-carbonic Anhydrase; Chain A (20)

Homologous Superfamily: Beta-carbonic Anhydrase; Chain A (20)

Haemophilus influenzae. Organism_taxid: 727. (13)

1a	3e3fB00	B:34-216
1b	3e3fA00	A:34-215

(no "Pfam Domain" information available for 3E3F)

Asymmetric Unit(hide GO term definitions)

Chain A,B (CAN_HAEIN | P45148)

molecular function
	GO:0004089	carbonate dehydratase activity	Catalysis of the reaction: H2CO3 = CO2 + H2O.
	GO:0016829	lyase activity	Catalysis of the cleavage of C-C, C-O, C-N and other bonds by other means than by hydrolysis or oxidation, or conversely adding a group to a double bond. They differ from other enzymes in that two substrates are involved in one reaction direction, but only one in the other direction. When acting on the single substrate, a molecule is eliminated and this generates either a new double bond or a new ring.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0008270	zinc ion binding	Interacting selectively and non-covalently with zinc (Zn) ions.
biological process
	GO:0015976	carbon utilization	A series of processes that forms an integrated mechanism by which a cell or an organism detects the depletion of primary carbon sources and then activates genes to scavenge the last traces of the primary carbon source and to transport and metabolize alternative carbon sources such as carbon dioxide or carbonic acid. The utilization process begins when the cell or organism detects carbon levels, includes the activation of genes whose products detect, transport or metabolize carbon-containing substances, and ends when carbon is incorporated into the cell or organism's metabolism.
cellular component
	GO:0005575	cellular_component	The part of a cell, extracellular environment or virus in which a gene product is located. A gene product may be located in one or more parts of a cell and its location may be as specific as a particular macromolecular complex, that is, a stable, persistent association of macromolecules that function together.

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Description

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Ligands, Modified Residues, Ions (2, 7)

Sites (7, 7)

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