E. coli Transcription Initiation Complex - 16-bp spacer and 4-nt RNA
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| X [auth R] | SCOP2B Superfamily | Sigma2 domain of RNA polymerase sigma factors | 8038503 | 3001393 | SCOP2B (2022-06-29) |
| O [auth L] | SCOP2B Superfamily | Sigma2 domain of RNA polymerase sigma factors | 8038503 | 3001393 | SCOP2B (2022-06-29) |
| F | SCOP2B Superfamily | Sigma2 domain of RNA polymerase sigma factors | 8038503 | 3001393 | SCOP2B (2022-06-29) |
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| V [auth P] | C1-set | e4yloP1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: C1-set | ECOD (v294.1) |
| M [auth J] | C1-set | e4yloJ1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: C1-set | ECOD (v294.1) |
| D | C1-set | e4yloD1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: C1-set | ECOD (v294.1) |
| X [auth R] | SAM_KSR1_N | e4yloR1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: SAM_KSR1_N | ECOD (v294.1) |
| O [auth L] | SAM_KSR1_N | e4yloL1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: SAM_KSR1_N | ECOD (v294.1) |
| F | LAGLIDADG_1 | e4yloF3 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| F | SAM_KSR1_N | e4yloF1 | A: a/b three-layered sandwiches | X: Periplasmic binding protein-like II | H: Rubredoxin-related | T: Tetrapyrrole methylase C-terminal domain | F: SAM_KSR1_N | ECOD (v294.1) |
| W [auth Q] | LAGLIDADG_1 | e4yloQ1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| N [auth K] | LAGLIDADG_1 | e4yloK1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| E | LAGLIDADG_1 | e4yloE1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| U [auth O] | LAGLIDADG_1 | e4yloO1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| L [auth I] | LAGLIDADG_1 | e4yloI1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| C | LAGLIDADG_1 | e4yloC1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| T [auth N] | LAGLIDADG_1 | e4yloN1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| S [auth M] | LAGLIDADG_1 | e4yloM1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| K [auth H] | LAGLIDADG_1 | e4yloH2 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| J [auth G] | LAGLIDADG_1 | e4yloG1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| B | LAGLIDADG_1 | e4yloB2 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
| A | LAGLIDADG_1 | e4yloA1 | A: a/b three-layered sandwiches | X: Bromodomain-like | H: HTH | T: Three-helical HTH | F: LAGLIDADG_1 | ECOD (v294.1) |
Protein Family Annotation Pfam Database Homepage
| Chains | Accession | Name | Description | Comments | Source |
|---|---|---|---|---|---|
| D, M [auth J], V [auth P] | PF00623 | RNA polymerase Rpb1, domain 2 (RNA_pol_Rpb1_2) | RNA polymerase Rpb1, domain 2 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 2, contains the active site ... | Domain |
| D, M [auth J], V [auth P] | PF05000 | RNA polymerase Rpb1, domain 4 (RNA_pol_Rpb1_4) | RNA polymerase Rpb1, domain 4 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 4, represents the funnel do ... | Domain |
| D, M [auth J], V [auth P] | PF04983 | RNA polymerase Rpb1, domain 3 (RNA_pol_Rpb1_3) | RNA polymerase Rpb1, domain 3 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 3, represents the pore doma ... | Domain |
| D, M [auth J], V [auth P] | PF04998 | RNA polymerase Rpb1, domain 5 (RNA_pol_Rpb1_5) | RNA polymerase Rpb1, domain 5 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 5, represents the discontin ... | Domain |
| F, O [auth L], X [auth R] | PF04539 | Sigma-70 region 3 (Sigma70_r3) | Sigma-70 region 3 | - | Family |
| F, O [auth L], X [auth R] | PF00140 | Sigma-70 factor, region 1.2 (Sigma70_r1_2) | Sigma-70 factor, region 1.2 | - | Family |
| F, O [auth L], X [auth R] | PF04542 | Sigma-70 region 2 (Sigma70_r2) | Sigma-70 region 2 | Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA ... | Domain |
| F, O [auth L], X [auth R] | PF04545 | Sigma-70, region 4 (Sigma70_r4) | Sigma-70, region 4 | Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix fami ... | Domain |
| F, O [auth L], X [auth R] | PF04546 | Sigma-70, non-essential region (Sigma70_ner) | Sigma-70, non-essential region | The domain is found in the primary vegetative sigma factor. The function of this domain is unclear and can be removed without loss of function. | Domain |
| E, N [auth K], W [auth Q] | PF01192 | RNA polymerase Rpb6 (RNA_pol_Rpb6) | RNA polymerase Rpb6 | - | Family |
| C, L [auth I], U [auth O] | PF04561 | RNA polymerase Rpb2, domain 2 (RNA_pol_Rpb2_2) | RNA polymerase Rpb2, domain 2 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA po ... | Domain |
| C, L [auth I], U [auth O] | PF10385 | RNA polymerase beta subunit external 1 domain (RNA_pol_Rpb2_45) | RNA polymerase beta subunit external 1 domain | RNA polymerases catalyse the DNA-dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared with three in eukaryotes (not including mitochondrial or chloroplast polymerases). This domain in prokaryotes spans the gap between ... | Domain |
| C, L [auth I], U [auth O] | PF04560 | RNA polymerase Rpb2, domain 7 (RNA_pol_Rpb2_7) | RNA polymerase Rpb2, domain 7 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA p ... | Domain |
| C, L [auth I], U [auth O] | PF04565 | RNA polymerase Rpb2, domain 3 (RNA_pol_Rpb2_3) | RNA polymerase Rpb2, domain 3 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Domain 3, s also known as the fork domain and is ... | Domain |
| C, L [auth I], U [auth O] | PF04563 | RNA polymerase beta subunit (RNA_pol_Rpb2_1) | RNA polymerase beta subunit | - | Family |
| C, L [auth I], U [auth O] | PF00562 | RNA polymerase Rpb2, domain 6 (RNA_pol_Rpb2_6) | RNA polymerase Rpb2, domain 6 | RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain represents the hybrid binding domain ... | Domain |
| PF01193 | RNA polymerase Rpb3/Rpb11 dimerisation domain (RNA_pol_L) | RNA polymerase Rpb3/Rpb11 dimerisation domain | The two eukaryotic subunits Rpb3 and Rpb11 dimerise to from a platform onto which the other subunits of the RNA polymerase assemble (D/L in archaea). The prokaryotic equivalent of the Rpb3/Rpb11 platform is the alpha-alpha dimer. The dimerisation do ... | Domain | |
| PF01000 | RNA polymerase Rpb3/RpoA insert domain (RNA_pol_A_bac) | RNA polymerase Rpb3/RpoA insert domain | Members of this family include: alpha subunit from eubacteria alpha subunits from chloroplasts Rpb3 subunits from eukaryotes RpoD subunits from archaeal | Domain |














