1MR1	Signaling Protein	date	Sep 17, 2002
title	Crystal Structure Of A Smad4-Ski Complex
authors	J.W.Wu, A.R.Krawitz, J.Chai, W.Li, F.Zhang, K.Luo, Y.Shi
compound		source
Molecule: Mothers Against Decapentaplegic Homolog 4 Chain: A, B Fragment: Mh2 Domain Synonym: Smad4, Mothers Against Dpp Homolog 4, Deletion Tar Pancreatic Carcinoma 4, Hsmad4; Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562
Molecule: Ski Oncogene Chain: C, D Fragment: Smad4-Binding Domain Synonym: Ski, C-Ski Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562
symmetry	Space Group: P 32 2 1	R_factor 0.231 R_Free 0.280
crystal cell	length a length b length c angle alpha angle beta angle gamma 109.800 109.800 141.100 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.85 Å
ligand	ZN	enzyme
related structures	by homologous chain: 1G88, 1U7V
Gene Ontology	Chain Function Process Component A, B D, C
Primary reference	Structural mechanism of Smad4 recognition by the nuclear oncoprotein Ski: insights on Ski-mediated repression of TGF-beta signaling., Wu JW, Krawitz AR, Chai J, Li W, Zhang F, Luo K, Shi Y, Cell 2002 Nov 1;111(3):357-67. PMID:12419246

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (95 Kb) [Save to disk] Biological Unit Coordinates (1mr1.pdb1.gz) 44 Kb Biological Unit Coordinates (1mr1.pdb2.gz) 49 Kb LPC: Ligand-Protein Contacts for 1MR1 CSU: Contacts of Structural Units for 1MR1 Likely Quarternary Molecular Structure file(s) for 1MR1 Retrieve 1MR1 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1MR1 from S2C, [Save to disk]

View 1MR1 in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 1MR1

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1MR1, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1mr1a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1mr1b_, region B [Jmol] [rasmolscript] [script source]     - Domain d1mr1c_, region C [Jmol] [rasmolscript] [script source]     - Domain d1mr1d_, region D [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1mr1] [1mr1_D] [1mr1_C] [1mr1_B] [1mr1_A] SWISS-PROT database: [P12755] [Q13485] Domain organization of [SKI_HUMAN] [SMAD4_HUMAN] by SWISSPFAM Domains found in 1MR1: [DWB] [c-SKI_SMAD_bind ] by SMART

Other resources with information on 1MR1

Community annotation for 1MR1 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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