Crystallography Open Database

Information card for entry 7107976

Preview

Coordinates	7107976.cif
Original paper (by DOI)	HTML
External links	PubChem

Structure parameters

Common name	Tetra peptide
Chemical name	Alpha gamma helix
Formula	C40 H62 N4 O8
Calculated formula	C40 H62 N4 O8
SMILES	O(C(C)(C)C)C(=O)NC(C)(C)C(=O)N[C@@H](Cc1ccccc1)CCC(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](Cc1ccccc1)CCC(=O)OCC.OC
Title of publication	alpha/gamma^4^-hybrid peptide helices: synthesis, crystal conformations and analogy with the alpha-helix
Authors of publication	Anupam Bandyopadhyay; Sandip Jadhav; Hosahudya Gopi
Journal of publication	Chem.Commun.
Year of publication	2012
Journal volume	48
Pages of publication	7170
a	10.132 ± 0.002 Å
b	20.141 ± 0.004 Å
c	21.01 ± 0.004 Å
α	90°
β	99.384 ± 0.005°
γ	90°
Cell volume	4230.1 ± 1.4 Å³
Cell temperature	100 ± 2 K
Ambient diffraction temperature	100 ± 2 K
Ambient diffracton pressure	101.325 kPa
Number of distinct elements	4
Space group number	4
Hermann-Mauguin space group symbol	P 1 21 1
Hall space group symbol	P 2yb
Residual factor for all reflections	0.1495
Residual factor for significantly intense reflections	0.0592
Weighted residual factors for significantly intense reflections	0.1383
Weighted residual factors for all reflections included in the refinement	0.1832
Goodness-of-fit parameter for all reflections included in the refinement	0.952
Diffraction radiation probe	x-ray
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
301853 (current)	2025-08-22	Add cross-references to PubChem compounds in COD range 7/10/ Each referenced PubChem compound corresponds to the full crystal structure.	7107976.cif
180183	2016-03-26	cif/7/10/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 7/10/79.	7107976.cif
106525	2014-03-15	cif/ (saulius@koala.ibt.lt) Adding DOIs to those Chem. Comm. structure descriptions that did not have it before and that could be matched unambiguously. Unambiguously means: a) journal name is "like 'Chem%Com%'" in SQl parlour b) first author's last name is the same in COD and in PubMed b) publication year and first page are the same in COD and in PubMed database. The commands to change these files where: awk '{print $1, $2}' outputs/join-dois.tab \ \| xargs -i sh -c ' CODID=$(echo {} \| awk "{print \$1}"); DOI=$(echo {} \| awk "{print \$2}"); CODFILE=$(echo $CODID \| codid2file); if ! grep -q _journal_paper_doi $CODFILE; then ( set -x; echo _journal_paper_doi $DOI >> $CODFILE ); else echo $CODID already has DOI; fi' Some files that did not had new-line at the end had to be fixed afterwards (in the ~/struct/cod/cif/7 directory, a COD working copy): svn st \ \| awk '{print $2}' \ \| xargs cifparse -q 2> /dev/null \ \| awk -F"'" '{print $2}' \ \| xargs perl -i -pe 's/_journal_paper_doi/\n_journal_paper_doi/' The working copy containing 'outputs/join-dois.tab' was: Path: /home/saulius/struct/xyz-extraction/dois/chem-comm-refetched-from-pubmed URL: svn+ssh://pitonas.ibt.lt/home/xray/svn-repositories/xyz-extraction/dois/chem-comm-refetched-from-pubmed Repository Root: svn+ssh://pitonas.ibt.lt/home/xray/svn-repositories/xyz-extraction Repository UUID: 9acf3947-1f02-0410-ae2a-984b57ad209b Revision: 2871 Node Kind: directory Schedule: normal Last Changed Author: saulius Last Changed Rev: 2871 Last Changed Date: 2014-03-15 11:18:46 +0200 (Sat, 15 Mar 2014) Three conflicts in files 10/81/7108128.cif, 10/81/7108130.cif and 10/99/7109903.cif were resolved manually.	7107976.cif
61273	2012-06-25	cif/ Adding structures of 7107976, 7107977, 7107978 via cif-deposit CGI script.	7107976.cif