3PV8 - JenaLib

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Title :   CRYSTAL STRUCTURE OF BACILLUS DNA POLYMERASE I LARGE FRAGMENT BOUND TO DNA AND DDTTP-DA IN CLOSED CONFORMATION

Authors :   W. Wang, L. S. Beese

Date :   06 Dec 10 (Deposition) - 19 Oct 11 (Release) - 09 Nov 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.52

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

Keywords :   Dna Polymerase I, Protein-Dna Complex, Thymine-Adenine, Closed Conformation, Transferase-Dna Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   W. Wang, H. W. Hellinga, L. S. Beese
Structural Evidence For The Rare Tautomer Hypothesis Of Spontaneous Mutagenesis.
Proc. Natl. Acad. Sci. Usa V. 108 17644 2011
PubMed-ID: 22006298 | Reference-DOI: 10.1073/PNAS.1114496108

Molecule 1 - DNA POLYMERASE I
	Chains	:	A, D
	EC Number	:	2.7.7.7
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET30A
	Expression System Strain	:	BL21(DE3)PLYSS
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Fragment	:	BACILLUS FRAGMENT (ANALOGOUS TO E. COLI KLENOW FRAGMENT)
	Gene	:	POLA, GK2730
	Mutation	:	YES
	Organism Scientific	:	GEOBACILLUS KAUSTOPHILUS
	Organism Taxid	:	1462

*Molecule 2 - DNA (5'-D(CPCPTPGPAPCPTPCP(2DT))-3')**
	Chains	:	B, E
	Engineered	:	YES
	Fragment	:	DNA PRIMER STRAND
	Synthetic	:	YES

*Molecule 3 - DNA (5'-D(CAPTPAPAPGPAPGPTPCPAPGPG)-3')**
	Chains	:	C, F
	Engineered	:	YES
	Fragment	:	DNA TEMPLATE STRAND
	Synthetic	:	YES

		1	2	3	4	5	6
Asymmetric Unit	:	A	B	C	D	E	F
Biological Unit 1 (1x)	:	A	B	C
Biological Unit 2 (1x)	:				D	E	F

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (4, 9)

No.	Name	Count	Type	Full Name
1	2DT	2	Mod. Nucleotide	3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE
2	D3T	2	Ligand/Ion	2',3'-DIDEOXY-THYMIDINE-5'-TRIPHOSPHATE
3	MG	2	Ligand/Ion	MAGNESIUM ION
4	SO4	3	Ligand/Ion	SULFATE ION

Biological Unit 1 (3, 3)

No.	Name	Count	Type	Full Name
1	2DT	1	Mod. Nucleotide	3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE
2	D3T	1	Ligand/Ion	2',3'-DIDEOXY-THYMIDINE-5'-TRIPHOSPHATE
3	MG	-1	Ligand/Ion	MAGNESIUM ION
4	SO4	1	Ligand/Ion	SULFATE ION

Biological Unit 2 (3, 4)

No.	Name	Count	Type	Full Name
1	2DT	1	Mod. Nucleotide	3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE
2	D3T	1	Ligand/Ion	2',3'-DIDEOXY-THYMIDINE-5'-TRIPHOSPHATE
3	MG	-1	Ligand/Ion	MAGNESIUM ION
4	SO4	2	Ligand/Ion	SULFATE ION

Asymmetric Unit (7, 7)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	D3T A:201 , ASP A:653 , TYR A:654 , ASP A:830	BINDING SITE FOR RESIDUE MG A 1
2	AC2	SOFTWARE	MG A:1 , HOH A:120 , HOH A:141 , ARG A:615 , ASP A:653 , TYR A:654 , GLN A:656 , ILE A:657 , GLU A:658 , HIS A:682 , ARG A:702 , LYS A:706 , TYR A:710 , ASP A:830 , HOH A:1311 , 2DT B:29 , HOH B:192 , DA C:3 , DA C:4	BINDING SITE FOR RESIDUE D3T A 201
3	AC3	SOFTWARE	ARG A:517 , ASN A:573 , LYS D:730	BINDING SITE FOR RESIDUE SO4 A 2
4	AC4	SOFTWARE	D3T D:202 , TYR D:654 , ASP D:830 , HOH D:1823	BINDING SITE FOR RESIDUE MG D 2
5	AC5	SOFTWARE	MG D:2 , HOH D:26 , HOH D:40 , ARG D:615 , TYR D:654 , SER D:655 , GLN D:656 , ILE D:657 , GLU D:658 , HIS D:682 , ARG D:702 , LYS D:706 , TYR D:710 , ASP D:830 , HOH D:1107 , HOH D:1690 , HOH D:1820 , HOH D:1823 , 2DT E:29 , HOH E:136 , DA F:3 , DA F:4	BINDING SITE FOR RESIDUE D3T D 202
6	AC6	SOFTWARE	MET D:299 , ALA D:300 , ARG D:343 , ARG D:677 , HOH D:1451	BINDING SITE FOR RESIDUE SO4 D 1
7	AC7	SOFTWARE	ARG D:629 , ARG D:703 , HOH D:956	BINDING SITE FOR RESIDUE SO4 D 3

(no "SS Bond" information available for 3PV8)

Asymmetric Unit

No.	Residues
1	Glu A:620	-	Pro A:621
2	Glu D:620	-	Pro D:621

(no "SAP(SNP)/Variant" information available for 3PV8)

(no "PROSITE Motif" information available for 3PV8)

(no "Exon" information available for 3PV8)

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:579
 aligned with Q5KWC1_GEOKA | Q5KWC1 from UniProtKB/TrEMBL  Length:878

    Alignment length:579
                                   309       319       329       339       349       359       369       379       389       399       409       419       429       439       449       459       469       479       489       499       509       519       529       539       549       559       569       579       589       599       609       619       629       639       649       659       669       679       689       699       709       719       729       739       749       759       769       779       789       799       809       819       829       839       849       859       869         
         Q5KWC1_GEOKA   300 KMAFTLADRVTEEMLADKAALVVEVVEENYHDAPIVGIAVVNEHGRFFLRPETALADPQFVAWLGDETKKKSMFDSKRAAVALKWKGIELCGVSFDLLLAAYLLDPAQGVDDVAAAAKMKQYEAVRPDEAVYGKGAKRAVPDEPVLAEHLVRKAAAIWELERPFLDELRRNEQDRLLVELEQPLSSILAEMEFAGVKVDTKRLEQMGKELAEQLGTVEQRIYELAGQEFNINSPKQLGVILFEKLQLPVLKKTKTGYSTSADVLEKLAPYHEIVENILHYRQLGKLQSTYIEGLLKVVRPDTKKVHTIFNQALTQTGRLSSTEPNLQNIPIRLEEGRKIRQAFVPSESDWLIFAADYSQIELRVLAHIAEDDNLMEAFRRDLDIHTKTAMDIFQVSEDEVTPNMRRQAKAVNFGIVYGISDYGLAQNLNISRKEAAEFIERYFESFPGVKRYMENIVQEAKQKGYVTTLLHRRRYLPDITSRNFNVRSFAERMAMNTPIQGSAADIIKKAMIDLNARLKEERLQARLLLQVHDELILEAPKEEMERLCRLVPEVMEQAVTLRVPLKVDYHYGSTWYDAK 878
               SCOP domains d3pv8a1 A:298-468 automated matches                                                                                                                                        d3pv8a2 A:469-876 automated matches                                                                                                                                                                                                                                                                                                                                                                                      SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....ee....hhhhhh.eeeeeee............eeeeee..eeeeehhhhhh.hhhhhhhhh....eeee.hhhhhhhhhhhh......eeeehhhhhhhhhhhhh..hhhhhhhhhh.....hhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhheeehhhhhhhhhhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhh........ee..ee..hhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhh.....ee..eee.........eee..........hhhhhhhhh.ee.....eeeeeeee.hhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhh......hhhhhhhhhhhhhhhhh..hhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheee.....eee.hhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeee...eeeeeee..hhhhhhhhhhhhhhh.........eeeeee....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3pv8 A 298 KMAFTLADRVTEEMLADKAALVVEVVEENYHDAPIVGIAVVNEHGRFFLRPETALADPQFVAWLGDETKKKSMFDSKRAAVALKWKGIELCGVSFDLLLAAYLLDPAQGVDDVAAAAKMKQYEAVRPDEAVYGKGAKRAVPDEPVLAEHLVRKAAAIWELERPFLDELRRNEQDRLLVELEQPLSSILAEMEFAGVKVDTKRLEQMGKELAEQLGTVEQRIYELAGQEFNINSPKQLGVILFEKLQLPVLKKTKTGYSTSADVLEKLAPYHEIVENILHYRQLGKLQSTYIEGLLKVVRPATKKVHTIFNQALTQTGRLSSTEPNLQNIPIRLEEGRKIRQAFVPSESDWLIFAADYSQIELRVLAHIAEDDNLMEAFRRDLDIHTKTAMDIFQVSEDEVTPNMRRQAKAVNYGIVYGISDYGLAQNLNISRKEAAEFIERYFESFPGVKRYMENIVQEAKQKGYVTTLLHRRRYLPDITSRNFNVRSFAERMAMNTPIQGSAADIIKKAMIDLNARLKEERLQAHLLLQVHDELILEAPKEEMERLCRLVPEVMEQAVTLRVPLKVDYHYGSTWYDAK 876
                                   307       317       327       337       347       357       367       377       387       397       407       417       427       437       447       457       467       477       487       497       507       517       527       537       547       557       567       577       587       597       607       617       627       637       647       657       667       677       687       697       707       717       727       737       747       757       767       777       787       797       807       817       827       837       847       857       867

Chain B from PDB  Type:DNA  Length:9
                                         
                 3pv8 B  21 CCTGACTCt  29
                                    |
                                   29-2DT

Chain C from PDB  Type:DNA  Length:12
                                            
                 3pv8 C   1 ATAAGAGTCAGG  12
                                    10

Chain D from PDB  Type:PROTEIN  Length:579
 aligned with Q5KWC1_GEOKA | Q5KWC1 from UniProtKB/TrEMBL  Length:878

    Alignment length:579
                                   309       319       329       339       349       359       369       379       389       399       409       419       429       439       449       459       469       479       489       499       509       519       529       539       549       559       569       579       589       599       609       619       629       639       649       659       669       679       689       699       709       719       729       739       749       759       769       779       789       799       809       819       829       839       849       859       869         
         Q5KWC1_GEOKA   300 KMAFTLADRVTEEMLADKAALVVEVVEENYHDAPIVGIAVVNEHGRFFLRPETALADPQFVAWLGDETKKKSMFDSKRAAVALKWKGIELCGVSFDLLLAAYLLDPAQGVDDVAAAAKMKQYEAVRPDEAVYGKGAKRAVPDEPVLAEHLVRKAAAIWELERPFLDELRRNEQDRLLVELEQPLSSILAEMEFAGVKVDTKRLEQMGKELAEQLGTVEQRIYELAGQEFNINSPKQLGVILFEKLQLPVLKKTKTGYSTSADVLEKLAPYHEIVENILHYRQLGKLQSTYIEGLLKVVRPDTKKVHTIFNQALTQTGRLSSTEPNLQNIPIRLEEGRKIRQAFVPSESDWLIFAADYSQIELRVLAHIAEDDNLMEAFRRDLDIHTKTAMDIFQVSEDEVTPNMRRQAKAVNFGIVYGISDYGLAQNLNISRKEAAEFIERYFESFPGVKRYMENIVQEAKQKGYVTTLLHRRRYLPDITSRNFNVRSFAERMAMNTPIQGSAADIIKKAMIDLNARLKEERLQARLLLQVHDELILEAPKEEMERLCRLVPEVMEQAVTLRVPLKVDYHYGSTWYDAK 878
               SCOP domains d3pv8d1 D:298-468 automated matches                                                                                                                                        d3pv8d2 D:469-876 automated matches                                                                                                                                                                                                                                                                                                                                                                                      SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....ee....hhhhh..eeeeeee............eeeeee..eeeeehhhhhh.hhhhhhhhhh...eeee.hhhhhhhhhhhh......eeeehhhhhhhhhhhhh..hhhhhhhh.......hhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhheeehhhhhhhhhhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhh........ee..ee..hhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhh.....ee..eee.........eee..........hhhhhhhhh.ee.....eeeeeeee.hhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheee.....eee.hhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeee...eeeeeee..hhhhhhhhhhhhhhh.........eeeeee....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3pv8 D 298 KMAFTLADRVTEEMLADKAALVVEVVEENYHDAPIVGIAVVNEHGRFFLRPETALADPQFVAWLGDETKKKSMFDSKRAAVALKWKGIELCGVSFDLLLAAYLLDPAQGVDDVAAAAKMKQYEAVRPDEAVYGKGAKRAVPDEPVLAEHLVRKAAAIWELERPFLDELRRNEQDRLLVELEQPLSSILAEMEFAGVKVDTKRLEQMGKELAEQLGTVEQRIYELAGQEFNINSPKQLGVILFEKLQLPVLKKTKTGYSTSADVLEKLAPYHEIVENILHYRQLGKLQSTYIEGLLKVVRPATKKVHTIFNQALTQTGRLSSTEPNLQNIPIRLEEGRKIRQAFVPSESDWLIFAADYSQIELRVLAHIAEDDNLMEAFRRDLDIHTKTAMDIFQVSEDEVTPNMRRQAKAVNYGIVYGISDYGLAQNLNISRKEAAEFIERYFESFPGVKRYMENIVQEAKQKGYVTTLLHRRRYLPDITSRNFNVRSFAERMAMNTPIQGSAADIIKKAMIDLNARLKEERLQAHLLLQVHDELILEAPKEEMERLCRLVPEVMEQAVTLRVPLKVDYHYGSTWYDAK 876
                                   307       317       327       337       347       357       367       377       387       397       407       417       427       437       447       457       467       477       487       497       507       517       527       537       547       557       567       577       587       597       607       617       627       637       647       657       667       677       687       697       707       717       727       737       747       757       767       777       787       797       807       817       827       837       847       857       867

Chain E from PDB  Type:DNA  Length:9
                                         
                 3pv8 E  21 CCTGACTCt  29
                                    |
                                   29-2DT

Chain F from PDB  Type:DNA  Length:12
                                            
                 3pv8 F   1 ATAAGAGTCAGG  12
                                    10

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 '\|'

Asymmetric Unit

Classes(

)

Folds(

)

Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

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

Fold: Ribonuclease H-like motif (1424)

Superfamily: Ribonuclease H-like (775)

Family: automated matches (127)

Protein domain: automated matches (127)

Geobacillus kaustophilus [TaxId: 1462] (8)

1a	d3pv8a1	A:298-468
1b	d3pv8d1	D:298-468

Class: Multi-domain proteins (alpha and beta) (2421)

Fold: DNA/RNA polymerases (850)

Superfamily: DNA/RNA polymerases (850)

Family: DNA polymerase I (233)

Protein domain: automated matches (26)

Geobacillus kaustophilus [TaxId: 1462] (8)

2a	d3pv8a2	A:469-876
2b	d3pv8d2	D:469-876

(no "CATH Domain" information available for 3PV8)

(no "Pfam Domain" information available for 3PV8)

Asymmetric Unit(hide GO term definitions)

Chain A,D (Q5KWC1_GEOKA | Q5KWC1)

molecular function
	GO:0008408	3'-5' exonuclease activity	Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' end.
	GO:0003677	DNA binding	Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
	GO:0003887	DNA-directed DNA polymerase activity	Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1); the synthesis of DNA from deoxyribonucleotide triphosphates in the presence of a DNA template and a 3'hydroxyl group.
	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: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:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0004518	nuclease activity	Catalysis of the hydrolysis of ester linkages within nucleic acids.
	GO:0003676	nucleic acid binding	Interacting selectively and non-covalently with any nucleic acid.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
	GO:0016779	nucleotidyltransferase activity	Catalysis of the transfer of a nucleotidyl group to a reactant.
	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:0071897	DNA biosynthetic process	The cellular DNA metabolic process resulting in the formation of DNA, deoxyribonucleic acid, one of the two main types of nucleic acid, consisting of a long unbranched macromolecule formed from one or two strands of linked deoxyribonucleotides, the 3'-phosphate group of each constituent deoxyribonucleotide being joined in 3',5'-phosphodiester linkage to the 5'-hydroxyl group of the deoxyribose moiety of the next one.
	GO:0006260	DNA replication	The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by initiation proteins, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
	GO:0006261	DNA-dependent DNA replication	A DNA replication process that uses parental DNA as a template for the DNA-dependent DNA polymerases that synthesize the new strands.
	GO:0090305	nucleic acid phosphodiester bond hydrolysis	The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
	GO:0006139	nucleobase-containing compound metabolic process	Any cellular metabolic process involving nucleobases, nucleosides, nucleotides and nucleic acids.

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	Cis Peptide Bonds
		Glu A:620 - Pro A:621	[ RasMol ]
		Glu D:620 - Pro D:621	[ RasMol ]

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Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (4, 9)

Sites (7, 7)

SS Bonds (0, 0)

Cis Peptide Bonds (2, 2)

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