PDBsum entry 1a7i

Lim domain containing proteins

PDB id: 1a7i

Contents

Protein chain

60 a.a. *

Metals

_ZN ×2

* Residue conservation analysis

PDB id:

1a7i

Name:

Lim domain containing proteins

Title:

Amino-terminal lim domain from quail cysteine and glycine-rich protein, nmr, minimized average structure

Structure:

Qcrp2 (lim1). Chain: a. Fragment: n-terminal lim domain. Engineered: yes

Source:

Coturnix japonica. Japanese quail. Organism_taxid: 93934. Gene: csrp2. Expressed in: escherichia coli. Expression_system_taxid: 562.

NMR struc:

1 models

Authors:

G.Kontaxis,R.Konrat,B.Kraeutler,R.Weiskirchen,K.Bister

Key ref:

G.Kontaxis et al. (1998). Structure and intramodular dynamics of the amino-terminal LIM domain from quail cysteine- and glycine-rich protein CRP2. Biochemistry, 37, 7127-7134. PubMed id: 9585524 DOI: 10.1021/bi973055v

Date:

15-Mar-98 Release date: 27-May-98

Protein chain

Q05158  (CSRP2_COTJA) -  Cysteine and glycine-rich protein 2 from Coturnix japonica

Seq: 194 a.a.

Struc: 60 a.a.

Enzyme reactions

• Enzyme class: E.C.?

DOI no: 10.1021/bi973055v

Biochemistry 37:7127-7134 (1998)

PubMed id: 9585524

Structure and intramodular dynamics of the amino-terminal LIM domain from quail cysteine- and glycine-rich protein CRP2.

G.Kontaxis, R.Konrat, B.Kräutler, R.Weiskirchen, K.Bister.

ABSTRACT

Members of the cysteine and glycine-rich protein (CRP) family (CRP1, CRP2, and CRP3) contain two zinc-binding LIM domains, LIM1 and LIM2, and are implicated in diverse cellular processes linked to differentiation, growth control and pathogenesis. The solution structure of an 81-amino acid recombinant peptide encompassing the amino-terminal LIM1 domain of quail CRP2 has been determined by 2D and 3D homo- and heteronuclear NMR spectroscopy. The LIM1 domain consists of two zinc binding sites of the CCHC and the CCCC type, respectively, which both contain two orthogonally arranged antiparallel beta-sheets and which are packed together by a hydrophobic core composed of residues from the zinc finger loop regions. The CCCC zinc finger is followed by a short alpha-helical stretch. The structural analysis revealed that the global fold of LIM1 closely resembles the recently determined solution structures of the carboxyl-terminal LIM2 domains of quail CRP2 and chicken CRP1, and that LIM1 and LIM2 are independently folded structural and presumably functional domains of CRP proteins. To explore the dynamical properties of CRP proteins, we have used 15N relaxation values (T1, T2, and nuclear Overhauser effect (NOE) to describe the dynamical behavior of a LIM domain. A model-free analysis revealed local variations in mobility along the backbone of the quail CRP2 LIM1 motif. Slow motions are evident in turn regions located between the various antiparallel beta-sheets or between their strands. By use of an extended motional model, fast backbone motions were detected for backbone amide NH groups of hydrophobic residues located in the core region of the LIM1 domain. These findings point to a flexible hydrophobic core in the LIM1 domain allowing residual relative mobility of the two zinc fingers, which might be important to optimize the LIM1 interface for interaction with its physiological target molecule(s) and to compensate enthalpically for the entropy loss upon binding.