3wg2

Crystal structure of Agrocybe cylindracea galectin mutant (N46A)Crystal structure of Agrocybe cylindracea galectin mutant (N46A)

Structural highlights

3wg2 is a 2 chain structure with sequence from Cyclocybe aegerita. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.2Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ATLE_CYCAE Anti-tumor lectin with DNase activity. Inhibits the growth of several tumor cell lines in vitro. Induces lymphocyte infiltration and necrosis of tumor cells in a mouse tumor model. Induces apoptosis in HeLa cells. Binds N-acetylneuraminyl lactose (N-acetyl-alpha-neuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucose) (PubMed:16051274).^[1] ^[2]

Publication Abstract from PubMed

A fungal galectin from Agrocybe cylindracea (ACG) exhibits broad binding specificity for beta-galactose-containing glycans. We determined the crystal structures of wild-type ACG and the N46A mutant, with and without glycan ligands. From these structures and a saccharide-binding analysis of the N46A mutant, we revealed that a conformational change of a unique insertion sequence containing Asn46 provides two binding modes for ACG, and thereby confers broad binding specificity. We propose that the unique sequence provides these two distinct glycan-binding modes by an induced-fit mechanism.

Conformational change of a unique sequence in a fungal galectin from Agrocybe cylindracea controls glycan ligand-binding specificity.,Kuwabara N, Hu D, Tateno H, Makyio H, Hirabayashi J, Kato R FEBS Lett. 2013 Nov 15;587(22):3620-5. doi: 10.1016/j.febslet.2013.08.046. Epub, 2013 Sep 10. PMID:24036446^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Zhao C, Sun H, Tong X, Qi Y. An antitumour lectin from the edible mushroom Agrocybe aegerita. Biochem J. 2003 Sep 1;374(Pt 2):321-7. PMID:12757412 doi:10.1042/BJ20030300
↑ Ban M, Yoon HJ, Demirkan E, Utsumi S, Mikami B, Yagi F. Structural basis of a fungal galectin from Agrocybe cylindracea for recognizing sialoconjugate. J Mol Biol. 2005 Aug 26;351(4):695-706. PMID:16051274 doi:10.1016/j.jmb.2005.06.045
↑ Kuwabara N, Hu D, Tateno H, Makyio H, Hirabayashi J, Kato R. Conformational change of a unique sequence in a fungal galectin from Agrocybe cylindracea controls glycan ligand-binding specificity. FEBS Lett. 2013 Nov 15;587(22):3620-5. doi: 10.1016/j.febslet.2013.08.046. Epub, 2013 Sep 10. PMID:24036446 doi:http://dx.doi.org/10.1016/j.febslet.2013.08.046

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OCA

[1] Zhao C, Sun H, Tong X, Qi Y. An antitumour lectin from the edible mushroom Agrocybe aegerita. Biochem J. 2003 Sep 1;374(Pt 2):321-7. PMID:12757412 doi:10.1042/BJ20030300

[2] Ban M, Yoon HJ, Demirkan E, Utsumi S, Mikami B, Yagi F. Structural basis of a fungal galectin from Agrocybe cylindracea for recognizing sialoconjugate. J Mol Biol. 2005 Aug 26;351(4):695-706. PMID:16051274 doi:10.1016/j.jmb.2005.06.045

[3] Kuwabara N, Hu D, Tateno H, Makyio H, Hirabayashi J, Kato R. Conformational change of a unique sequence in a fungal galectin from Agrocybe cylindracea controls glycan ligand-binding specificity. FEBS Lett. 2013 Nov 15;587(22):3620-5. doi: 10.1016/j.febslet.2013.08.046. Epub, 2013 Sep 10. PMID:24036446 doi:http://dx.doi.org/10.1016/j.febslet.2013.08.046

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