SAXSdb — 2gho

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1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase subunit alpha

Thermus aquaticus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	DNA-directed RNA polymerase subunit beta × 1 （Q9KWU7） ;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ; × 1 （Q9KWU6）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPOA_THEAQ
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–314； UniProt 1–314 Author chain B； PDBConstruct 1–314； UniProt 1–314

DNA-directed RNA polymerase subunit beta

Thermus aquaticus

UniProt Q9KWU7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	DNA-directed RNA polymerase subunit alpha × 2 （Q9KWU8） ;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ; × 1 （Q9KWU6）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPOB_THEAQ
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–1119； UniProt 1–1119

;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ;

Thermus aquaticus

UniProt Q9KWU6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	DNA-directed RNA polymerase subunit alpha × 2 （Q9KWU8） DNA-directed RNA polymerase subunit beta × 1 （Q9KWU7）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPOC_THEAQ
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain D； PDBConstruct 1–158； UniProt 1–158 Author chain D； PDBConstruct 161–1233； UniProt 452–1524

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2gho
Deposition date deposition_date	2006-03-27
Structure title title	Recombinant Thermus aquaticus RNA polymerase for Structural Studies
Keywords keywords	Thermus aquaticus RNA polymerase, recombinant multiprotein complex, coexpression, TRANSFERASE; TRANSFERASE
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2gho__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2gho__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2gho__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	45.13 Å
Rg (electron density)	44.73 Å
Total Rg	44.96 Å
Atom count	11060
Residues	2765
Excluded volume	152420 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2gho__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	DNA-directed RNA polymerase subunit alpha
Molecular weight formula_weight	34830.9 kDa
EC 编号 ec_number	2.7.7.6
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	11060

MLESKLKAPVFTATTQGDHYGEFVLEPLERGFGVTLGNPLRRILLSSIPGTAVTSVYIEDVLHEFSTIPGVKEDVVEIILNLKELVVRFLDPKMASTTLILRAEGPKEVRAGDFTPSADVEIMNPDLHIATLEEGGKLYMEVRVDRGVGYVPAERHGIKDRINAIPVDAIFSPVRRVAFQVEDTRLGQRTDLDKLTLRIWTDGSVTPLEALNQAVAILKEHLNYFANPEASLLPTPEVSKGEKRESAEEDLDLPLEELGLSTRVLHSLKEEGIESVRALLALNLKDLRNIPGIGERSLEEIRQALAKKGFTLKE

Source Source

Source organism organism	Thermus aquaticus
NCBI taxonomy ID ncbi_taxonomy_id	271
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	DNA-directed RNA polymerase subunit beta
Molecular weight formula_weight	124930.0 kDa
EC 编号 ec_number	2.7.7.6
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MEIKRFGRIREVIPLPPLTEIQVESYKKALQADVPPEKRENVGIQAAFKETFPIEEGDKGKGGLVLDFLEYRIGDPPFSQDECREKDLTYQAPLYARLQLIHKDTGLIKEDEVFLGHLPLMTEDGSFIINGADRVIVSQIHRSPGVYFTPDPARPGRYIASIIPLPKRGPWIDLEVEASGVVTMKVNKRKFPLVLLLRVLGYDQETLVRELSAYGDLVQGLLDEAVLAMRPEEAMVRLFTLLRPGDPPKKDKALAYLFGLLADPKRYDLGEAGRYKAEEKLGVGLSGRTLVRFEDGEFKDEVFLPTLRYLFALTAGVPGHEVDDIDHLGNRRIRTVGELMADQFRVGLARLARGVRERMVMGSPDTLTPAKLVNSRPLEAALREFFSRSQLSQFKDETNPLSSLRHKRRISALGPGGLTRERAGFDVRDVHRTHYGRICPVETPEGANIGLITSLAAYARVDALGFIRTPYRRVKNGVVTEEVVYMTASEEDRYTIAQANTPLEGDRIATDRVVARRRGEPVIVAPEEVEFMDVSPKQVFSLNTNLIPFLEHDDANRALMGSNMQTQAVPLIRAQAPVVMTGLEERVVRDSLAALYAEEDGEVVKVDGTRIAVRYEDGRLVEHPLRRYARSNQGTAFDQRPRVRVGQRVKKGDLLADGPASEEGFLALGQNVLVAIMPFDGYNFEDAIVISEELLKRDFYTSIHIERYEIEARDTKLGPERITRDIPHLSEAALRDLDEEGIVRIGAEVKPGDILVGRTSFKGEQEPSPEERLLRSIFGEKARDVKDTSLRVPPGEGGIVVGRLRLRRGDPGVELKPGVREVVRVFVAQKRKLQVGDKLANRHGNKGVVAKILPVEDMPHLPDGTPVDVILNPLGVPSRMNLGQILETHLGLAGYFLGQRYISPVFDGATEPEIKELLAEAFNLYFGKRQGEGFGVDKREKEVLARAEKLGLVSPGKSPEEQLKELFDLGKVVLYDGRTGEPFEGPIVVGQMFIMKLYHMVEDKMHARSTGPYSLITQQPLGGKAQFGGQRFGEMEVWALEAYGAAHTLQEMLTIKSDDIEGRNAAYQAIIKGEDVPEPSVPESFRVLVKELQALALDVQTLDEKDNPVDIFEGLASKR

Source Source

Source organism organism	Thermus aquaticus
NCBI taxonomy ID ncbi_taxonomy_id	271
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 polymer

Description description	;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ;
Molecular weight formula_weight	138693.2 kDa
EC 编号 ec_number	2.7.7.6,2.7.7.6
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

MKKEVRKVRIALASPEKIRSWSYGEVEKPETINYRTLKPERDGLFDERIFGPIKDYECACGKYKRQRFEGKVCERCGVEVTRSIVRRYRMGHIELATPAAHIWFVKDVPSKIGTLLDLSATELEQVLYFNKYIVLDPKGAVLDGVPVEKRQLLTDEEYGGIDARMGAEAIQELLKELDLEKLERELLEEMKHPSRARRAKARKRLEVVRAFLDSGNRPEWMILEAVPVLPPDLRPMVQVDGGRFATSDLNDLYRRLINRNNRLKKLLAQGAPEIIIRNEKRMLQEAVDAVIDNGRRGSPVTNPGSERPLRSLTDILSGKQGRFRQNLLGKRVDYSGRSVIVVGPQLKLHQCGLPKRMALELFKPFLLKKMEEKAFAPNVKAARRMLERQRDIKDEVWDALEEVIHGKVVLLNRAPTLHRLGIQAFQPVLVEGQSIQLHPLVCEAFNADFDGDQMAVHVPLSSFAQAEARIQMLSAHNLLSPASGEPLAKPSRDIILGLYYITQVRKEKKGAGMAFATPEEALAAYERGEVALNAPIVVAGRETSVGRLKFVFANPDEALLAVAHGLLDLQDVVTVRYLGRRLETSPGRILFARIVGEAVGDEKVAQELIQMDVPQEKNSLKDLVYQAFLRLGMEKTARLLDALKYYGFTLSTTSGITIGIDDAVIPEEKQRYLEEADRKLRQIEQAYEMGFLTDRERYDQVIQLWTETTEKVTQAVFKNFEENYPFNPLYVMAQSGARGNPQQIRQLCGMRGLMQKPSGETFEVPVRSSFREGLTVLEYFISSHGARKGGADTALRTADSGYLTRKLVDVAHEIVVREADCGTTNYISVPLFQMDEVTRTLRLRKRSDIESGLYGRVLAREVEALGRRLEEGRYLSLEDVHFLIKAAEAGEVREVPVRSPLTCQTRYGVCQKCYGYDLSMARPVSIGEAVGVVAAESIGEPGTQLTMRTFHTGGVAVGTDITQGLPRVIELFEARRPKAKAVISEIDGVVRIEEGEDRLSVFVESEGFSKEYKLPKDARLLVKDGDYVEAGQPLTRGAIDPHQLLEAKGPEAVERYLVDEIQKVYRAQGVKLHDKHIEIVVRQMLKYVEVTDPGDSRLLEGQVLEKWDVEALNERLIAEGKVPVAWKPLLMGVTKSALSTKSWLSAASFQNTTHVLTEAAIAGKKDELIGLKENVILGRLIPAGTGSDFVRFTQVVDQRTLKAIEEARKEAVEAKEKEAPRRPVRREQPGKGL

Source Source

Source organism organism	Thermus aquaticus
NCBI taxonomy ID ncbi_taxonomy_id	271
Host organism host_organism	Escherichia coli BL21(DE3)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2ghoa1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.74 — DCoH-like
Superfamily Superfamily superfamily	d.74.3 — RBP11-like subunits of RNA polymerase
Family Family family	d.74.3.1 — RNA polymerase alpha subunit dimerisation domain

Domain ID domain_id	d2ghoa2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.181 — Insert subdomain of RNA polymerase alpha subunit
Superfamily Superfamily superfamily	d.181.1 — Insert subdomain of RNA polymerase alpha subunit
Family Family family	d.181.1.1 — Insert subdomain of RNA polymerase alpha subunit

Domain ID domain_id	d2ghob1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.74 — DCoH-like
Superfamily Superfamily superfamily	d.74.3 — RBP11-like subunits of RNA polymerase
Family Family family	d.74.3.1 — RNA polymerase alpha subunit dimerisation domain

Domain ID domain_id	d2ghob2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.181 — Insert subdomain of RNA polymerase alpha subunit
Superfamily Superfamily superfamily	d.181.1 — Insert subdomain of RNA polymerase alpha subunit
Family Family family	d.181.1.1 — Insert subdomain of RNA polymerase alpha subunit

Domain ID domain_id	d2ghoc1
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.29 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Superfamily Superfamily superfamily	e.29.1 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Family Family family	e.29.1.1 — RNA-polymerase beta

Domain ID domain_id	d2ghod1
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.29 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Superfamily Superfamily superfamily	e.29.1 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Family Family family	e.29.1.2 — RNA-polymerase beta-prime

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Unit-cell length a length_a	202.800 Å
Unit-cell length b length_b	202.800 Å
Unit-cell length c length_c	326.800 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	P 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	5.000 Å
Low-resolution limit resolution_low	25.000 Å
R factor r_factor	—
R_work r_work	0.3360
R_free r_free	0.3370

Recombinant Thermus aquaticus RNA polymerase for Structural Studies

1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase subunit alpha

State in the Current Structure

Other States of the Same Protein in the Database

DNA-directed RNA polymerase subunit beta

State in the Current Structure

Other States of the Same Protein in the Database

;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ;

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2gho__assembly_1__model_1

2gho__assembly_1__model_1 | I(q)

2gho__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

7. Citations (1)

Recombinant Thermus aquaticus RNA polymerase for Structural Studies

1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase subunit alpha

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase subunit beta

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

;DNA-directed RNA polymerase subunit beta',DNA-directed RNA polymerase subunit beta' ;

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2gho__assembly_1__model_1

2gho__assembly_1__model_1 | I(q)

2gho__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

7. Citations (1)