SCOPe 2.06: Domain d1r22a_: 1r22 A:

Lineage for d1r22a_ (1r22 A:)

1. Root: SCOPe 2.06

2. Class a: All alpha proteins [46456] (289 folds)

3. Fold a.4: DNA/RNA-binding 3-helical bundle [46688] (14 superfamilies)
   core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down

4. Superfamily a.4.5: "Winged helix" DNA-binding domain [46785] (85 families)
   contains a small beta-sheet (wing)

5. Family a.4.5.5: ArsR-like transcriptional regulators [46801] (5 proteins)
   The N- and C-terminal helical extensions to the common fold form the dimer interface

6. Protein SmtB repressor [46802] (1 species)

7. Species Cyanobacteria (Synechococcus), pcc7942 [TaxId:1129] [46803] (4 PDB entries)
   Uniprot P30340

8. Domain d1r22a_: 1r22 A: [104777]
   complexed with zn; mutant

Details for d1r22a_

PDB Entry: 1r22, 2.3 Å

PDB Description: crystal structure of the cyanobacterial metallothionein repressor smtb (c14s/c61s/c121s mutant) in the zn2alpha5-form

PDB Compounds: (A:) Transcriptional repressor smtB

SCOPe Domain Sequences for d1r22a_:

Sequence, based on SEQRES records:

>d1r22a_ a.4.5.5 (A:) SmtB repressor {Cyanobacteria (Synechococcus), pcc7942 [TaxId: 1129]}
lqaiapevaqslaeffavladpnrlrllsllarselsvgdlaqaigvsesavshqlrslr
nlrlvsyrkqgrhvyyqlqdhhivalyqnaldhlqes

Sequence, based on observed residues (ATOM records):

>d1r22a_ a.4.5.5 (A:) SmtB repressor {Cyanobacteria (Synechococcus), pcc7942 [TaxId: 1129]}
lqaiapevaqslaeffavladpnrlrllsllarselsvgdlaqaigvsesavshqlrslr
nlrlvsyrhvyyqlqdhhivalyqnaldhlqes

Timeline for d1r22a_:

• d1r22a_ first appeared in SCOP 1.69
  
• d1r22a_ appears in SCOPe 2.05
  
• d1r22a_ appears in SCOPe 2.07
  
• d1r22a_ appears in the current release, SCOPe 2.08