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(-) Description

Title :  HETERODIMERIC STRUCTURE OF THE CORE PRIMASE.
 
Authors :  S. H. Lao-Sirieix, R. K. Nookala, P. Roversi, S. D. Bell, L. Pellegrini
Date :  26 May 05  (Deposition) - 08 Nov 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.33
Chains :  Asym. Unit :  A,B,C,D
Biol. Unit 1:  A,B  (1x)
Biol. Unit 2:  C,D  (1x)
Biol. Unit 3:  A (1x),B (1x),C (1x),D (1x)
Biol. Unit 4:  A (1x),B (1x),C (1x),D (1x)
Biol. Unit 5:  A (1x),B (1x),C (1x),D (1x)
Keywords :  Heterodimeric Complex, Replication, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  S. H. Lao-Sirieix, R. K. Nookala, P. Roversi, S. D. Bell, L. Pellegrini
Structure Of The Heterodimeric Core Primase.
Nat. Struct. Mol. Biol. V. 12 1137 2005
PubMed-ID: 16273105  |  Reference-DOI: 10.1038/NSMB1013
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - DNA PRIMASE SMALL SUBUNIT
    Chains: A, C
    EC Number: 2.7.7.-
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET-DUET
    Expression System Strain: BL21(DE)
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Gene: PRIA
    Organism Scientific: SULFOLOBUS SOLFATARICUS
    Organism Taxid: 2287
 
Molecule 2 - DNA PRIMASE LARGE SUBUNIT
    Chains: B, D
    EC Number: 2.7.7.-
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET-DUET
    Expression System Strain: BL21(DE)
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Fragment: RESIDUES 1-212
    Gene: PRIB
    Organism Scientific: SULFOLOBUS SOLFATARICUS
    Organism Taxid: 2287

 Structural Features

(-) Chains, Units

  1234
Asymmetric Unit : ABCD
Biological Unit 1 (1x): AB  
Biological Unit 2 (1x):   CD
Biological Unit 3 (1x): A (1x)B (1x)C (1x)D (1x)
Biological Unit 4 (1x): A (1x)B (1x)C (1x)D (1x)
Biological Unit 5 (1x): A (1x)B (1x)C (1x)D (1x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 41)

Asymmetric Unit (2, 41)
No.NameCountTypeFull Name
1SO439Ligand/IonSULFATE ION
2ZN2Ligand/IonZINC ION
Biological Unit 1 (1, 21)
No.NameCountTypeFull Name
1SO421Ligand/IonSULFATE ION
2ZN-1Ligand/IonZINC ION
Biological Unit 2 (1, 18)
No.NameCountTypeFull Name
1SO418Ligand/IonSULFATE ION
2ZN-1Ligand/IonZINC ION
Biological Unit 3 (1, 21)
No.NameCountTypeFull Name
1SO421Ligand/IonSULFATE ION
2ZN-1Ligand/IonZINC ION
Biological Unit 4 (1, 21)
No.NameCountTypeFull Name
1SO421Ligand/IonSULFATE ION
2ZN-1Ligand/IonZINC ION
Biological Unit 5 (0, 0)
No.NameCountTypeFull Name
1SO4-1Ligand/IonSULFATE ION
2ZN-1Ligand/IonZINC ION

(-) Sites  (40, 40)

Asymmetric Unit (40, 40)
No.NameEvidenceResiduesDescription
01AC1SOFTWARECYS A:116 , CYS A:119 , CYS A:128 , ASP A:131BINDING SITE FOR RESIDUE ZN A 999
02AC2SOFTWARECYS C:116 , CYS C:119 , CYS C:128 , ASP C:131BINDING SITE FOR RESIDUE ZN C 999
03AC3SOFTWARESER A:173 , ASN A:175 , ARG A:176 , HIS A:253 , SO4 A:1009BINDING SITE FOR RESIDUE SO4 A 1000
04AC4SOFTWARELYS A:255 , ASN A:321 , SO4 A:1012BINDING SITE FOR RESIDUE SO4 A 1001
05AC5SOFTWAREHIS B:164 , LYS B:165BINDING SITE FOR RESIDUE SO4 B 213
06AC6SOFTWAREARG A:303BINDING SITE FOR RESIDUE SO4 A 1002
07AC7SOFTWARELYS A:15 , ARG A:19 , SER C:55BINDING SITE FOR RESIDUE SO4 C 1000
08AC8SOFTWAREARG B:95 , HIS B:99BINDING SITE FOR RESIDUE SO4 B 214
09AC9SOFTWARESER C:173 , ASN C:175 , ARG C:176 , HIS C:253 , SO4 C:1004BINDING SITE FOR RESIDUE SO4 C 1001
10BC1SOFTWAREASN A:132 , LYS C:169 , ARG C:262BINDING SITE FOR RESIDUE SO4 C 1002
11BC2SOFTWAREARG C:303BINDING SITE FOR RESIDUE SO4 C 1003
12BC3SOFTWAREARG D:95 , TRP D:156BINDING SITE FOR RESIDUE SO4 D 213
13BC4SOFTWARESO4 B:218 , ASN C:302BINDING SITE FOR RESIDUE SO4 B 215
14BC5SOFTWARELYS A:109 , SER A:215 , ASN A:217BINDING SITE FOR RESIDUE SO4 A 1003
15BC6SOFTWARETHR A:47 , TYR A:48BINDING SITE FOR RESIDUE SO4 A 1004
16BC7SOFTWAREASP A:235 , GLN A:237 , ARG A:244BINDING SITE FOR RESIDUE SO4 A 1005
17BC8SOFTWARETHR A:289 , ARG A:303BINDING SITE FOR RESIDUE SO4 A 1006
18BC9SOFTWAREHIS C:179 , ARG C:247 , HIS C:253 , SO4 C:1001BINDING SITE FOR RESIDUE SO4 C 1004
19CC1SOFTWAREASN C:321BINDING SITE FOR RESIDUE SO4 C 1005
20CC2SOFTWAREGLU D:103 , LYS D:172BINDING SITE FOR RESIDUE SO4 D 214
21CC3SOFTWARESO4 A:1007 , SER C:56 , SER C:57 , GLU C:58BINDING SITE FOR RESIDUE SO4 C 1006
22CC4SOFTWAREGLY A:9 , GLN A:10 , SO4 C:1006BINDING SITE FOR RESIDUE SO4 A 1007
23CC5SOFTWARESER C:215BINDING SITE FOR RESIDUE SO4 C 1007
24CC6SOFTWAREASN C:175 , ARG C:176 , LYS C:255 , ARG C:320BINDING SITE FOR RESIDUE SO4 C 1008
25CC7SOFTWARELYS B:130 , ARG B:132BINDING SITE FOR RESIDUE SO4 B 216
26CC8SOFTWARELYS A:169BINDING SITE FOR RESIDUE SO4 A 1008
27CC9SOFTWAREASP A:101 , HIS A:179 , ARG A:247 , SO4 A:1000BINDING SITE FOR RESIDUE SO4 A 1009
28DC1SOFTWAREARG B:132 , ILE B:133 , ILE B:134 , GLN B:135BINDING SITE FOR RESIDUE SO4 B 217
29DC2SOFTWARESER A:56 , SER A:57BINDING SITE FOR RESIDUE SO4 A 1010
30DC3SOFTWAREPRO B:200 , GLU B:201 , SO4 B:215 , LYS C:300BINDING SITE FOR RESIDUE SO4 B 218
31DC4SOFTWARESER C:45 , ASP C:46 , THR C:47BINDING SITE FOR RESIDUE SO4 C 1010
32DC5SOFTWAREASN B:102 , GLU B:103 , LYS B:172BINDING SITE FOR RESIDUE SO4 B 219
33DC6SOFTWAREALA A:122 , VAL A:123 , VAL A:124 , SER A:125BINDING SITE FOR RESIDUE SO4 A 1011
34DC7SOFTWARESER C:125 , GLU C:126BINDING SITE FOR RESIDUE SO4 C 1011
35DC8SOFTWARELYS A:255 , SO4 A:1001BINDING SITE FOR RESIDUE SO4 A 1012
36DC9SOFTWARECYS C:108 , LYS C:109 , ARG C:148BINDING SITE FOR RESIDUE SO4 C 1012
37EC1SOFTWAREILE D:199 , PRO D:200 , GLU D:201BINDING SITE FOR RESIDUE SO4 D 215
38EC2SOFTWARELYS C:15 , ARG C:19BINDING SITE FOR RESIDUE SO4 C 1013
39EC3SOFTWARELYS B:81 , ARG B:84 , ARG B:85BINDING SITE FOR RESIDUE SO4 B 220
40EC4SOFTWARECYS C:184 , TYR C:185 , GLY C:186BINDING SITE FOR RESIDUE SO4 C 1014

(-) SS Bonds  (6, 6)

Asymmetric Unit
No.Residues
1A:108 -A:145
2A:184 -A:188
3B:120 -B:139
4C:108 -C:145
5C:184 -C:188
6D:120 -D:139

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1ZT2)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1ZT2)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1ZT2)

(-) Exons   (0, 0)

(no "Exon" information available for 1ZT2)

(-) 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:327
 aligned with PRIS_SULSO | Q97Z83 from UniProtKB/Swiss-Prot  Length:330

    Alignment length:327
                                    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       
           PRIS_SULSO     3 TFTLHQGQTNLIKSFFRNYYLNAELELPKDMELREFALQPFGSDTYVRHLSFSSSEELRDYLVNRNLPLHLFYSSARYQLPSARNMEEKAWMGSDLLFDIDADHLCKLRSIRFCPVCGNAVVSEKCERDNVETLEYVEMTSECIKRGLEQTRNLVEILEDDFGLKPKVYFSGNRGFHVQVDCYGNCALLDSDERKEIAEYVMGIGVPGYPGGSENAPGWVGRKNRGINGVTIDEQVTIDVKRLIRIPNSLHGKSGLIVKRVPNLDDFEFNETLSPFTGYTIFLPYITIETEVLGSIIKLNRGIPIKIKSSIGIYLHLRNLGEVKAYV 329
               SCOP domains d1zt2a1 A:3-329 DNA primase small subunit PriA                                                                                                                                                                                                                                                                                          SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .........hhhhhhhhhhhhhh......hhhhh.eeeee.............hhhhhhhhhhh...eeeeeee..........hhhhhh.....eeee.hhhhhhh.eeeee...........ee....ee.eeeee.hhhhhhhhhhhhhhhhhhhhhh.....eeee.....eeeee...hhhhhhhhhhhhhhhhhhh...............hhhhhhhh.......hhhhhhh...eee..............ee........hhhhh....eeeeee...eeee....eeee.....eeeehhhhhhhhhh..eeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1zt2 A   3 TFTLHQGQTNLIKSFFRNYYLNAELELPKDMELREFALQPFGSDTYVRHLSFSSSEELRDYLVNRNLPLHLFYSSARYQLPSARNMEEKAWMGSDLLFDIDADHLCKLRSIRFCPVCGNAVVSEKCERDNVETLEYVEMTSECIKRGLEQTRNLVEILEDDFGLKPKVYFSGNRGFHVQVDCYGNCALLDSDERKEIAEYVMGIGVPGYPGGSENAPGWVGRKNRGINGVTIDEQVTIDVKRLIRIPNSLHGKSGLIVKRVPNLDDFEFNETLSPFTGYTIFLPYITIETEVLGSIIKLNRGIPIKIKSSIGIYLHLRNLGEVKAYV 329
                                    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       


Chain B from PDB  Type:PROTEIN  Length:207
 aligned with PRIL_SULSO | Q9UWW1 from UniProtKB/Swiss-Prot  Length:307

    Alignment length:207
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       
           PRIL_SULSO     3 LDVKKYPFIKSLDDELKKYGGGITLTDLLLNSTTLIDQAKDRIQKTKSGDELPHYVSYNEPVLVFYTTLLSLAILNDVKLIRRYAYAEAKQFRSLLHTENEENLLEISKLLDLKINRCDPIKFYLEKKRRIIQKEFCVHFIDYLKYTKDLKEDWKLSGQILHKGYVYLDKNQLIGLIAESIKSKIVEMIRPLNLKEIPEKLKSLIER 209
               SCOP domains d1zt2b1 B:3-209 DNA primase large subunit PriB, N-terminal domain                                                                                                                                               SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....hhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhh...eeeeeeeee......eeeeeeeeehhhhhhhh...hhhhh.....ee..eeeehhhhhhhhhhhhhhhhhhhhhhhhhh...hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1zt2 B   3 LDVKKYPFIKSLDDELKKYGGGITLTDLLLNSTTLIDQAKDRIQKTKSGDELPHYVSYNEPVLVFYTTLLSLAILNDVKLIRRYAYAEAKQFRSLLHTENEENLLEISKLLDLKINRCDPIKFYLEKKRRIIQKEFCVHFIDYLKYTKDLKEDWKLSGQILHKGYVYLDKNQLIGLIAESIKSKIVEMIRPLNLKEIPEKLKSLIER 209
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       


Chain C from PDB  Type:PROTEIN  Length:320
 aligned with PRIS_SULSO | Q97Z83 from UniProtKB/Swiss-Prot  Length:330

    Alignment length:320
                                    20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330
           PRIS_SULSO    11 TNLIKSFFRNYYLNAELELPKDMELREFALQPFGSDTYVRHLSFSSSEELRDYLVNRNLPLHLFYSSARYQLPSARNMEEKAWMGSDLLFDIDADHLCKLRSIRFCPVCGNAVVSEKCERDNVETLEYVEMTSECIKRGLEQTRNLVEILEDDFGLKPKVYFSGNRGFHVQVDCYGNCALLDSDERKEIAEYVMGIGVPGYPGGSENAPGWVGRKNRGINGVTIDEQVTIDVKRLIRIPNSLHGKSGLIVKRVPNLDDFEFNETLSPFTGYTIFLPYITIETEVLGSIIKLNRGIPIKIKSSIGIYLHLRNLGEVKAYVR 330
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) -----------------------------------------------------------------------------------------DNA_primase_S-1zt2C01 C:100-273                                                                                                                                               --------------------------------------------------------- Pfam domains (1)
           Pfam domains (2) -----------------------------------------------------------------------------------------DNA_primase_S-1zt2C02 C:100-273                                                                                                                                               --------------------------------------------------------- Pfam domains (2)
         Sec.struct. author .hhhhhhhhhhhhh.......hhhhh.eeeee......eeee...hhhhhhhhhh....eeeeeee.eee......hhhhhheeee.eeee.hhhhh...eeeee...........ee....ee.eeeee.hhhhhhhhhhhhhhhhhhhhhh.....eeee.....eeeee....hhhhhhhhhhhhhhhhhhh..............hhhhhhh........hhhhhh....eee..............ee........hhhhh....eeeeee...eeee....eeee.....eeeehhhhhhhhhh..eeeeeee. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1zt2 C  11 TNLIKSFFRNYYLNAELELPKDMELREFALQPFGSDTYVRHLSFSSSEELRDYLVNRNLPLHLFYSSARYQLPSARNMEEKAWMGSDLLFDIDADHLCKLRSIRFCPVCGNAVVSEKCERDNVETLEYVEMTSECIKRGLEQTRNLVEILEDDFGLKPKVYFSGNRGFHVQVDCYGNCALLDSDERKEIAEYVMGIGVPGYPGGSENAPGWVGRKNRGINGVTIDEQVTIDVKRLIRIPNSLHGKSGLIVKRVPNLDDFEFNETLSPFTGYTIFLPYITIETEVLGSIIKLNRGIPIKIKSSIGIYLHLRNLGEVKAYVR 330
                                    20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330


Chain D from PDB  Type:PROTEIN  Length:202
 aligned with PRIL_SULSO | Q9UWW1 from UniProtKB/Swiss-Prot  Length:307

    Alignment length:208
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201        
           PRIL_SULSO     2 ALDVKKYPFIKSLDDELKKYGGGITLTDLLLNSTTLIDQAKDRIQKTKSGDELPHYVSYNEPVLVFYTTLLSLAILNDVKLIRRYAYAEAKQFRSLLHTENEENLLEISKLLDLKINRCDPIKFYLEKKRRIIQKEFCVHFIDYLKYTKDLKEDWKLSGQILHKGYVYLDKNQLIGLIAESIKSKIVEMIRPLNLKEIPEKLKSLIER 209
               SCOP domains -d1zt2d1 D:3-209 DNA primase large subunit PriB, N-terminal domain                                                                                                                                               SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) --------------------------------------------------------------------------------------------------------------------------------------DNA_primase_lrg-1zt2D01 D:136-209                                          Pfam domains (1)
           Pfam domains (2) --------------------------------------------------------------------------------------------------------------------------------------DNA_primase_lrg-1zt2D02 D:136-209                                          Pfam domains (2)
         Sec.struct. author ......hhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhh..eeeeeeeee.------.eeeeeeeehhhhhhhh...hhhhh.........eeeehhhhhhhhhhhhhhhhhhhhhh.......hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1zt2 D   2 ALDVKKYPFIKSLDDELKKYGGGITLTDLLLNSTTLIDQAKDRIQKTKSGDELPHYVSYNEPVLVFYTTLLSLAILNDVKLIRRYAYAEAKQFRSLLHTENEENLLEISKLLDLKINRCDPIKFY------IIQKEFCVHFIDYLKYTKDLKEDWKLSGQILHKGYVYLDKNQLIGLIAESIKSKIVEMIRPLNLKEIPEKLKSLIER 209
                                    11        21        31        41        51        61        71        81        91       101       111       121    |    - |     141       151       161       171       181       191       201        
                                                                                                                                                      126    133
   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, 3)

Asymmetric Unit
(-)
Class: All alpha proteins (14657)
(-)
Class: Alpha and beta proteins (a+b) (23004)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1ZT2)

(-) Pfam Domains  (2, 4)

Asymmetric Unit
(-)
Clan: AEP (3)
(-)
Clan: DNA_primase_lrg (4)

(-) Gene Ontology  (11, 19)

Asymmetric Unit(hide GO term definitions)
Chain A,C   (PRIS_SULSO | Q97Z83)
molecular function
    GO:0003896    DNA primase activity    Catalysis of the synthesis of a short RNA primer on a DNA template, providing a free 3'-OH that can be extended by DNA-directed DNA polymerases.
    GO:0003899    DNA-directed 5'-3' RNA polymerase activity    Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template, i.e. the catalysis of DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    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: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:0006269    DNA replication, synthesis of RNA primer    The synthesis of a short RNA polymer, usually 4-15 nucleotides long, using one strand of unwound DNA as a template; the RNA then serves as a primer from which DNA polymerases extend synthesis.
cellular component
    GO:1990077    primosome complex    Any of a family of protein complexes that form at the origin of replication or stalled replication forks and function in replication primer synthesis in all organisms. Early complexes initiate double-stranded DNA unwinding. The core unit consists of a replicative helicase and a primase. The helicase further unwinds the DNA and recruits the polymerase machinery. The primase synthesizes RNA primers that act as templates for complementary stand replication by the polymerase machinery. The primosome contains a number of associated proteins and protein complexes and contributes to the processes of replication initiation, lagging strand elongation, and replication restart.

Chain B,D   (PRIL_SULSO | Q9UWW1)
molecular function
    GO:0051539    4 iron, 4 sulfur cluster binding    Interacting selectively and non-covalently with a 4 iron, 4 sulfur (4Fe-4S) cluster; this cluster consists of four iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands.
    GO:0003896    DNA primase activity    Catalysis of the synthesis of a short RNA primer on a DNA template, providing a free 3'-OH that can be extended by DNA-directed DNA polymerases.
    GO:0003899    DNA-directed 5'-3' RNA polymerase activity    Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template, i.e. the catalysis of DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.
    GO:0051536    iron-sulfur cluster binding    Interacting selectively and non-covalently with an iron-sulfur cluster, a combination of iron and sulfur atoms.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0016779    nucleotidyltransferase activity    Catalysis of the transfer of a nucleotidyl group to a reactant.
    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: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: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:0006269    DNA replication, synthesis of RNA primer    The synthesis of a short RNA polymer, usually 4-15 nucleotides long, using one strand of unwound DNA as a template; the RNA then serves as a primer from which DNA polymerases extend synthesis.
cellular component
    GO:1990077    primosome complex    Any of a family of protein complexes that form at the origin of replication or stalled replication forks and function in replication primer synthesis in all organisms. Early complexes initiate double-stranded DNA unwinding. The core unit consists of a replicative helicase and a primase. The helicase further unwinds the DNA and recruits the polymerase machinery. The primase synthesizes RNA primers that act as templates for complementary stand replication by the polymerase machinery. The primosome contains a number of associated proteins and protein complexes and contributes to the processes of replication initiation, lagging strand elongation, and replication restart.

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