1n73

<table><tr><td colspan='2'>[[1n73]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/Petromyzon_marinus Petromyzon marinus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N73 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1N73 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1lwu|1lwu]], [[1fzc|1fzc]], [[1fzf|1fzf]], [[1n86|1n86]], [[1n8e|1n8e]]</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1n73 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n73 OCA], [http://pdbe.org/1n73 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1n73 RCSB], [http://www.ebi.ac.uk/pdbsum/1n73 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1n73 ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/FIBA1_PETMA FIBA1_PETMA]] Fibrinogen has a double function: yielding monomers that polymerize into fibrin and acting as a cofactor in platelet aggregation. [[http://www.uniprot.org/uniprot/FIBG_PETMA FIBG_PETMA]] Fibrinogen has a double function: yielding monomers that polymerize into fibrin and acting as a cofactor in platelet aggregation. [[http://www.uniprot.org/uniprot/FIBB_PETMA FIBB_PETMA]] Fibrinogen has a double function: yielding monomers that polymerize into fibrin and acting as a cofactor in platelet aggregation.

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== Publication Abstract from PubMed ==

The crystal structure of fragment double-D from factor XIII-cross-linked lamprey fibrin has been determined at 2.9 A resolution. The 180 kDa covalent dimer was cocrystallized with the peptide Gly-His-Arg-Pro-amide, which in many fibrinogens, but not that of lamprey, corresponds to the B-knob exposed by thrombin. The structure was determined by molecular replacement, a recently determined structure of lamprey fragment D being used as a search model. GHRPam was found in both the gamma- and beta-chain holes. Unlike the situation with fragment D, the crystal packing of the cross-linked double-D structure exhibits two different D-D interfaces, each gamma-chain facing gamma-chains on two other molecules. One of these (interface I) involves the asymmetric interface observed in all other D fragments and related structures. The other (interface II) encompasses a completely different set of residues. The two abutments differ in that interface I results in an "in line" arrangement of abutting molecules and the interface II in a "zigzag" arrangement. So far as can be determined (the electron density could only be traced on one side of the cross-links), it is the gamma-chains of the newly observed zigzag units (interface II) that are joined by the reciprocal epsilon-amino-gamma-glutamyl cross-links. Auspiciously, the same novel D-D interface was observed in two lower-resolution crystal structures of human double-D preparations that had been crystallized under unusual circumstances. These observations show that double-D structures are linked in a way that is sufficiently flexible to accommodate different D-D interfaces under different circumstances.

The crystal structure of fragment double-D from cross-linked lamprey fibrin reveals isopeptide linkages across an unexpected D-D interface.,Yang Z, Pandi L, Doolittle RF Biochemistry. 2002 Dec 31;41(52):15610-7. PMID:12501189<ref>PMID:12501189</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Doolittle, R F]]

[[Category: Pandi, L]]

[[Category: Yang, Z]]

[[Category: Protein-peptide complex]]