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Chen X, Mirazee JM, Skorupka KA, Matsuo H, Youkharibache P, Taylor N, Walters KJ. The CD8α hinge is intrinsically disordered with a dynamic exchange that includes proline cis-trans isomerization. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2022; 340:107234. [PMID: 35617919 PMCID: PMC9237829 DOI: 10.1016/j.jmr.2022.107234] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/04/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
T cells engineered to express artificial chimeric antigen receptors (CARs) that selectively target tumor-specific antigens or deleterious cell types offer transformative therapeutic possibilities. CARs contain an N-terminal extracellular antigen recognition domain, C-terminal intracellular signal transduction domains, and connecting hinge and transmembrane regions, each of which have been varied to optimize targeting and minimize toxicity. We find that a CD22-targeting CAR harboring a CD8α hinge (H) exhibits greater cytotoxicity against a low antigen density CD22+ leukemia as compared to an equivalent CAR with a CD28 H. We therefore studied the biophysical and dynamic properties of the CD8α H by nuclear magnetic resonance (NMR) spectroscopy. We find that a large region of the CD8α H undergoes dynamic chemical exchange between distinct and observable states. This exchanging region contains proline residues dispersed throughout the sequence that undergo cis-trans isomerization. Up to four signals of differing intensity are observed, with the most abundantly populated being intrinsically disordered and with all prolines in the trans isomerization state. The lesser populated states all contain cis prolines and evidence of local structural motifs. Altogether, our data suggest that the CD8α H lacks long-range structural order but has local structural motifs that transiently exchange with a dominant disordered state. We propose that structural plasticity and local structural motifs promoted by cis proline states within the CD8α H are important for relaying and amplifying antigen-binding effects to the transmembrane and signal transduction domains.
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Affiliation(s)
- Xiang Chen
- Center for Structural Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Justin M Mirazee
- Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20814, USA; Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20894, USA; Johns Hopkins University Department of Biology, 3400 N. Charles Street, Baltimore, MD 21218, USA
| | - Katarzyna A Skorupka
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Hiroshi Matsuo
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Philippe Youkharibache
- Cancer Data Science Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20894, USA.
| | - Naomi Taylor
- Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20814, USA.
| | - Kylie J Walters
- Center for Structural Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
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Dabalos CL, Ohgo K, Kumashiro KK. Detection of Labile Conformations of Elastin’s Prolines by Solid-State Nuclear Magnetic Resonance and Fourier Transform Infrared Techniques. Biochemistry 2019; 58:3848-3860. [DOI: 10.1021/acs.biochem.9b00414] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Chester L. Dabalos
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Kosuke Ohgo
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Kristin K. Kumashiro
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
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Schmidt JM, Howard MJ, Maestre-Martínez M, Pérez CS, Löhr F. Variation in protein C(alpha)-related one-bond J couplings. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:16-30. [PMID: 18853398 DOI: 10.1002/mrc.2337] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Four types of polypeptide (1)J(C alpha X) couplings are examined, involving the main-chain carbon C(alpha) and either of four possible substituents. A total 3105 values of (1)J(C alpha H alpha), (1)J(C alpha C beta), (1)J(C alpha C'), and (1)J(C alpha N') were collected from six proteins, averaging 143.4 +/- 3.3, 34.9 +/- 2.5, 52.6 +/- 0.9, and 10.7 +/- 1.2 Hz, respectively. Analysis of variances (ANOVA) reveals a variety of factors impacting on (1)J and ranks their relative statistical significance and importance to biomolecular NMR structure refinement. Accordingly, the spread in the (1)J values is attributed, in equal proportions, to amino-acid specific substituent patterns and to polypeptide-chain geometry, specifically torsions phi, psi, and chi(1) circumjacent to C(alpha). The (1)J coupling constants correlate with protein secondary structure. For alpha-helical phi, psi combinations, (1)J(C alpha H alpha) is elevated by more than one standard deviation (147.8 Hz), while both (1)J(C alpha N') and (1)J(C alpha C beta) fall short of their grand means (9.5 and 33.7 Hz). Rare positive phi torsion angles in proteins exhibit concomitant small (1)J(C alpha H alpha) and (1)J(C alpha N') (138.4 and 9.6 Hz) and large (1)J(C alpha C beta) (39.9 Hz) values. The (1)J(C alpha N') coupling varies monotonously over the phi torsion range typical of beta-sheet secondary structure and is largest (13.3 Hz) for phi around -160 degrees. All four coupling types depend on psi and thus help determine a torsion that is notoriously difficult to assess by traditional approaches using (3)J. Influences on (1)J stemming from protein secondary structure and other factors, such as amino-acid composition, are largely independent.
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Affiliation(s)
- Jürgen M Schmidt
- Department of Biosciences, University of Kent, Canterbury CT2 7NJ, UK.
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Vičar J, Bláha K, Piriou F, Fromageot P, Fermandjian S. 13C-13C couplings in13C-labeled cyclo (tri-L-prolyl) and the pyrrolidine ring conformation. Biopolymers 2004. [DOI: 10.1002/bip.1979.360180419] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hoffm�ller W, Polborn K, Knizek J, N�th H, Beck W. Metallkomplexe mit biologisch wichtigen Liganden. XCV. ?5- Pentamethylcyclopentadienyl-Rhodium-, -Iridium-, (?6-Benzol)-Ruthenium- und Phosphan-Palladium-Komplexe von Prolinmethylester und Prolinamid. Z Anorg Allg Chem 1997. [DOI: 10.1002/zaac.19976231214] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Ragnarsson U. Proteinogenic amino acids labelled with 15N and/or 13C for application in peptide synthesis: a short review with a comprehensive list of published derivatives. J Pept Sci 1995; 1:149-56. [PMID: 9222992 DOI: 10.1002/psc.310010302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A review is given of the literature dealing with the most common protected derivatives of 15N- and/or 13C-labelled amino acids of interest in peptide synthesis. The list contains all such Boc-, Z- and Fmoc-amino acids as well as published methyl, ethyl, t-butyl and benzyl esters.
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Affiliation(s)
- U Ragnarsson
- Department of Biochemistry, University of Uppsala, Biomedical Center, Sweden
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Mapelli C, Van Halbeek H, Stammer CH. Synthesis and conformational studies by 1H- and 13C-NMR spectroscopy of a novel, sterically constrained analogue of thyrotropin-releasing hormone. Biopolymers 1990; 29:407-22. [PMID: 2158826 DOI: 10.1002/bip.360290212] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel thyrotropin-releasing hormone (TRH) analogue, [2,4-MePro3]-TRH (2,4-MePro: 2-carboxy-2,4-methanopyrrolidine), has been synthesized using a rapid solid phase peptide synthesis method, and its conformational properties investigated by one- and two-dimensional (2D) nmr spectroscopy and by proton Overhauser measurements. Following a published approach, calibrated interproton Overhauser effects were used together with distance geometry analysis to deduce that the single conformation of the His-2,4-MePro tertiary amide bond is trans in aqueous solution. This conclusion was corroborated by 2D dipolar-correlated (NOESY) spectroscopy. A preferentially extended conformation is indicated by the nmr data, similar to that of TRH. The phi, psi conformational space of 2,4-MePro is, however, significantly different from that of trans proline and the structural consequences of these differences at the C-terminus are discussed. The distribution of histidine side-chain conformations in the TRH analogue was deduced from coupling constants and from the short-range interaction between the imidazole ring and one of the prochiral faces of the 2,4-MePro side chain.
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Affiliation(s)
- C Mapelli
- School of Chemical Sciences, Department of Chemistry, University of Georgia, Athens 30602
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Berger S. Investigations to charge dependence of 13C13C spin-spin coupling constants - aminobenzoic acids and their ionic species. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)87622-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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London RE, Walker TE. Asymmetric NMR spectra of weakly coupled nuclei: A common characteristic in the13C NMR spectra of [U-13C]-labeled molecules and in natural abundance protoncoupled13C spectra. ACTA ACUST UNITED AC 1981. [DOI: 10.1002/mrc.1270150404] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Toma F, Lam-Thanh H, Piriou F, Heindl MC, Lintner K, Fermandjian S. NMR evidence for a type I ?-turn in (Pro2)-tetrapeptides and interdependence ofcis:Trans isomerism, ring flexibility, and backbone conformation. Biopolymers 1980. [DOI: 10.1002/bip.1980.360190406] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Vicar J, Abillon E, Toma F, Piriou F, Lintner K, Bláha K, Fromageot P, Fermandjian S. The two conformations of TRH in solution. FEBS Lett 1979; 97:275-8. [PMID: 104887 DOI: 10.1016/0014-5793(79)80101-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Hansen PE, Berg A. 13C,13C coupling constants in anthracene, 9,10-dihydroanthracene and phthalic acid derivatives. Determination of signs by the symmetrical double labelling (SDL) method V. ACTA ACUST UNITED AC 1979. [DOI: 10.1002/mrc.1270120111] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Viswanatha V, Larsen B, Hruby V. Synthesis of dl-[2-13C]leucine and it use in the preparation of [3-dl-[2-13C]leucine]oxytocin and [8-dl-[2-13C]leucine]oxytocin. Tetrahedron 1979. [DOI: 10.1016/0040-4020(79)80018-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Piriou F, Toma F, Savrda J, Fermandjian S. Synthesis and nmr analysis of cyclo-[85% 13C-asp]-pro: 13C-13C vicinal coupling constants and conformation. Tetrahedron 1979. [DOI: 10.1016/0040-4020(79)80085-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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London RE, Matwiyoff NA, Stewart JM, Cann JR. 13C nuclear magnetic resonance study of the cis-trans isomerism in X-Pro-Pro tripeptides. Biochemistry 1978; 17:2277-83. [PMID: 28142 DOI: 10.1021/bi00605a004] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
13C nuclear magnetic resonance has been used to characterize quantitatively the cis-trans isomerism about both peptide bonds in the tripeptides Ser-Pro-Pro and Arg-Pro-Pro. Detailed pH titration data indicate that the configuration about both peptide bonds is closely linked to titration of the terminal carboxyl group and, to a lesser extent, to titration of the terminal amino group. The Pro2 C-3 resonance has been found particularly useful for interpretation due to its sensitivity to the isomerization about both peptide bonds. Analysis of the probabilities of the trans-trans, cic-cis, cis-trans, and trans-cis isomers in aqueous solution indicates a stability decrease in the order given. Similarities in the isomerization behavior of the two peptides indicate that side chain interactions involving the first residue have very little effect on the observed cis/trans ratios. The sensitivity of the cis/trans ratio to titration of the terminal amino group is most readily explained on the basis of an indirect effect on carbonyl-carbonyl repulsion.
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Cohen JS. Nuclear magnetic resonance studies of biologically relevant isotopes other than hydrogen. CRC CRITICAL REVIEWS IN BIOCHEMISTRY 1978; 5:25-43. [PMID: 357083 DOI: 10.3109/10409237809177139] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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20
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Marshall GR, Gorin FA, Moore ML. Chapter 24. Peptide Conformation and Biological Activity. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 1978. [DOI: 10.1016/s0065-7743(08)60627-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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