Structure of PDB 4b1x Chain B Binding Site BS01

Receptor Information
>4b1x Chain B (length=357) Species: 9986 (Oryctolagus cuniculus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
TTALVCDNGSGLVKAGFAGDDAPRAVFPSIVGRSYVGDEAQSKRGILTLK
YPIEHGIITNWDDMEKIWHHTFYNELRVAPEEHPTLLTEAPLNPKANREK
MTQIMFETFNVPAMYVAIQAVLSLYASGRTTGIVLDSGDGVTHNVPIYEG
YALPHAIMRLDLAGRDLTDYLMKILTERGYSFVTTAEREIVRDIKEKLCY
VALDFENEMATAASSSSLEKSYELPDGQVITIGNERFRCPETLFQPSFIG
MESAGIHETTYNSIMKCDIDIRKDLYANNVMSGGTTMYPGIADRMQKEIT
ALAPSTMKIKIIAPPERKYSVWIGGSILASLSTFQQMWITKQEYDEAGPS
IVHRKCF
Ligand information
>4b1x Chain M (length=28) Species: 10090 (Mus musculus) [Search peptide sequence] [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
QIGTKLTRRLSQRPTAEELEQRNILKPR
Receptor-Ligand Complex Structure
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PDB4b1x Structures of the Phactr1 RPEL domain and RPEL motif complexes with G-actin reveal the molecular basis for actin binding cooperativity.
Resolution1.8 Å
Binding residue
(original residue number in PDB)		L110 Y143 G146 T148 E167 G168 Y169 P172 H173 I175 I345 L349 T351 F375
Binding residue
(residue number reindexed from 1)		L92 Y125 G128 T130 E149 G150 Y151 P154 H155 I157 I327 L331 T333 F357
Enzymatic activity
Enzyme Commision number 3.6.4.-
Gene Ontology
Molecular Function
GO:0000287 magnesium ion binding
GO:0003785 actin monomer binding
GO:0005509 calcium ion binding
GO:0005515 protein binding
GO:0005523 tropomyosin binding
GO:0005524 ATP binding
GO:0016787 hydrolase activity
GO:0019904 protein domain specific binding
GO:0031013 troponin I binding
GO:0031432 titin binding
GO:0032036 myosin heavy chain binding
GO:0042802 identical protein binding
GO:0048306 calcium-dependent protein binding
GO:0140660 cytoskeletal motor activator activity
Biological Process
GO:0010628 positive regulation of gene expression
GO:0030041 actin filament polymerization
GO:0030240 skeletal muscle thin filament assembly
GO:0048741 skeletal muscle fiber development
GO:0051017 actin filament bundle assembly
GO:0090131 mesenchyme migration
Cellular Component
GO:0001725 stress fiber
GO:0005737 cytoplasm
GO:0005856 cytoskeleton
GO:0005865 striated muscle thin filament
GO:0005884 actin filament
GO:0030027 lamellipodium
GO:0030175 filopodium
GO:0031941 filamentous actin
GO:0032432 actin filament bundle
GO:0044297 cell body
GO:0098723 skeletal muscle myofibril

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Biological Process
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Cellular Component
External links
PDB RCSB:4b1x, PDBe:4b1x, PDBj:4b1x
PDBsum4b1x
PubMed23041370
UniProtP68135|ACTS_RABIT Actin, alpha skeletal muscle (Gene Name=ACTA1)

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