1fch: Difference between revisions

Revision as of 16:10, 2 May 2008

CRYSTAL STRUCTURE OF THE PTS1 COMPLEXED TO THE TPR REGION OF HUMAN PEX5

OverviewOverview

Many proteins contain targeting signals within their sequences that specify their delivery to particular organelles. The peroxisomal targeting signal-1 (PTS1) is a C-terminal tripeptide that is sufficient to direct proteins into peroxisomes. The PTS1 sequence closely approximates Ser-Lys-Leu-COO-. PEX5, the receptor for PTS1, interacts with the signal via a series of tetratricopeptide repeats (TPRs) within its C-terminal half. Here we report the crystal structure of a fragment of human PEX5 that includes all seven predicted TPR motifs in complex with a pentapeptide containing a PTS1 sequence. Two clusters of three TPRs almost completely surround the peptide, while a hinge region, previously identified as TPR4, forms a distinct structure that enables the two sets of TPRs to form a single binding site. This structure reveals the molecular basis for PTS1 recognition and demonstrates a novel mode of TPR-peptide interaction.

About this StructureAbout this Structure

1FCH is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

ReferenceReference

Peroxisomal targeting signal-1 recognition by the TPR domains of human PEX5., Gatto GJ Jr, Geisbrecht BV, Gould SJ, Berg JM, Nat Struct Biol. 2000 Dec;7(12):1091-5. PMID:11101887 Page seeded by OCA on Fri May 2 16:10:17 2008

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OCA

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 [[Image:1fch.gif|left|200px]]
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 '''CRYSTAL STRUCTURE OF THE PTS1 COMPLEXED TO THE TPR REGION OF HUMAN PEX5'''
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 [[Category: Gould, S J.]]
 [[Category: Jr., G J.Gatto.]]
-[[Category: helical repeat]]
+[[Category: Helical repeat]]
-[[Category: protein-peptide complex]]
+[[Category: Protein-peptide complex]]
-[[Category: tetratricopeptide repeat]]
+[[Category: Tetratricopeptide repeat]]
-[[Category: tpr]]
+[[Category: Tpr]]
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 16:10:17 2008''
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:20:16 2008''