SCOPe 2.08: Domain d3k1ab_: 3k1a B:

Lineage for d3k1ab_ (3k1a B:)

1. Root: SCOPe 2.08

2. Class c: Alpha and beta proteins (a/b) [51349] (148 folds)

3. Fold c.92: Chelatase-like [53799] (3 superfamilies)
   duplication: tandem repeat of two domains; 3 layers (a/b/a); parallel beta-sheet of 4 strands, order 2134

4. Superfamily c.92.2: 'Helical backbone' metal receptor [53807] (5 families)
   contains a long alpha helical insertion in the interdomain linker

5. Family c.92.2.3: Nitrogenase iron-molybdenum protein [53816] (3 proteins)
   contains three domains of this fold; "Helical backbone" holds domains 2 and 3
   both chains are homologous; the inter-chain arrangement of domains 1 is similar to the intra-chain arrangement of domains 2 and 3
   automatically mapped to Pfam PF00148

6. Protein Nitrogenase iron-molybdenum protein, beta chain [81401] (4 species)
   both chains are homologous; the inter-chain arrangement of domains 1 is similar to the intra-chain arrangement of domains 2 and 3

7. Species Azotobacter vinelandii [TaxId:354] [81397] (39 PDB entries)

8. Domain d3k1ab_: 3k1a B: [178944]
   Other proteins in same PDB: d3k1aa_, d3k1ac_
   automated match to d1fp4b_
   complexed with ca, cfn, clf, hca

Details for d3k1ab_

PDB Entry: 3k1a, 2.23 Å

PDB Description: insights into substrate binding at femo-cofactor in nitrogenase from the structure of an alpha-70ile mofe protein variant

PDB Compounds: (B:) nitrogenase molybdenum-iron protein beta chain

SCOPe Domain Sequences for d3k1ab_:

Sequence; same for both SEQRES and ATOM records:

>d3k1ab_ c.92.2.3 (B:) Nitrogenase iron-molybdenum protein, beta chain {Azotobacter vinelandii [TaxId: 354]}
sqqvdkikasyplfldqdykdmlakkrdgfeekypqdkidevfqwtttkeyqelnfqrea
ltvnpakacqplgavlcalgfektmpyvhgsqgcvayfrsyfnrhfrepvscvsdsmted
aavfggqqnmkdglqnckatykpdmiavsttcmaevigddlnafinnskkegfipdefpv
pfahtpsfvgshvtgwdnmfegiaryftlksmddkvvgsnkkinivpgfetylgnfrvik
rmlsemgvgysllsdpeevldtpadgqfrmyaggttqeemkdapnalntvllqpwhlekt
kkfvegtwkhevpklnipmgldwtdeflmkvseisgqpipasltkergrlvdmmtdshtw
lhgkrfalwgdpdfvmglvkfllelgcepvhilchngnkrwkkavdailaaspygknatv
yigkdlwhlrslvftdkpdfmignsygkfiqrdtlhkgkefevplirigfpifdrhhlhr
sttlgyegamqilttlvnsilerldeetrgmqatdynhdlvr

Timeline for d3k1ab_:

• d3k1ab_ first appeared in SCOPe 2.01
  
• d3k1ab_ appears in SCOPe 2.07