Heme binding to the SARS-CoV-2 spike glycoprotein.
Heme binding to the SARS-CoV-2 spike glycoprotein.
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DOI:
10.1016/j.jbc.2023.105014
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发表时间:
2023-08
影响因子:
4.8
通讯作者:
Raven, Emma L.
中科院分区:
文献类型:
--
作者:
Freeman, Samuel L.;Oliveira, A. Sofia F.;Gallio, Andrea E.;Rosa, Annachiara;Simitakou, Maria K.;Arthur, Christopher J.;Mulholland, Adrian J.;Cherepanov, Peter;Raven, Emma L.
The target for humoral immunity, SARS-CoV-2 spike glycoprotein, has become the focus of vaccine research and development. Previous work demonstrated that the N-terminal domain (NTD) of SARS-CoV-2 spike binds biliverdin—a product of heme catabolism—causing a strong allosteric effect on the activity of a subset of neutralizing antibodies. Herein, we show that the spike glycoprotein is also able to bind heme (KD = 0.5 ± 0.2 μM). Molecular modeling indicated that the heme group fits well within the same pocket on the SARS-CoV-2 spike NTD. Lined by aromatic and hydrophobic residues (W104, V126, I129, F192, F194, I203, and L226), the pocket provides a suitable environment to stabilize the hydrophobic heme. Mutagenesis of N121 has a substantive effect on heme binding (KD = 3000 ± 220 μM), confirming the pocket as a major heme binding location of the viral glycoprotein. Coupled oxidation experiments in the presence of ascorbate indicated that the SARS-CoV-2 glycoprotein can catalyze the slow conversion of heme to biliverdin. The heme trapping and oxidation activities of the spike may allow the virus to reduce levels of free heme during infection to facilitate evasion of the adaptive and innate immunity.
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影响因子:
3.7
作者:
通讯作者:
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影响因子:
18.2
作者:
Casalino L;Gaieb Z;Goldsmith JA;Hjorth CK;Dommer AC;Harbison AM;Fogarty CA;Barros EP;Taylor BC;McLellan JS;Fadda E;Amaro RE
通讯作者:
Amaro RE
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通讯作者:
POSTMA, JPM
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Dhawan, Subhash
通讯作者:
Dhawan, Subhash
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4.8
作者:
Cummins, Nathan W.;Weaver, Eric A.;Badley, Andrew D.
通讯作者:
Badley, Andrew D.