A salivary factor binds a cuticular protein and modulates biting by inducing morphological changes in the mosquito labrum.

Arnoldi I, Mancini G, Fumagalli M, Gastaldi D, D'Andrea L, Bandi C, Di Venere M, Iadarola P, Forneris F, Gabrieli P, Curr Biol (2022) Europe PMC

SASDJX7 – Labrum-Interacting Proteins from Saliva 2 (34k-2) - SEC-SAXS

Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2
MWI(0) 34 kDa
MWexpected 35 kDa
VPorod 50 nm3
log I(s) 4.69×101 4.69×100 4.69×10-1 4.69×10-2
Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 small angle scattering data  s, nm-1
ln I(s)
Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 Guinier plot ln 4.70×101 Rg: 2.7 nm 0 (2.7 nm)-2 s2
(sRg)2I(s)/I(0)
Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 Kratky plot 1.104 0 3 sRg
p(r)
Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 pair distance distribution function Rg: 2.7 nm 0 Dmax: 8.4 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 ALLOSMOD model

Synchrotron SAXS data from solutions of labrum-interacting protein from saliva in 25 mM HEPES/NaOH, 0.1 M NaCl, pH 8 were collected on the BM29 beam line at the ESRF (Grenoble, France) using a Pilatus 1M detector at a sample-detector distance of 2.9 m and at a wavelength of λ = 0.099 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Size exclusion chromatography coupled to SAXS (SEC-SAXS) was carried out at at 20°C using Nexera High Pressure Liquid Chromatography system (HPLC; Shimadzu). 50 μL of LIPS-2 concentrated at 10 mg/mL were injected into a Superdex 75 3.2/300 PC (GE Healthcare), pre-equilibrated with 25 mM HEPES/NaOH, 100 mM NaCl, pH 8.0. 82 successive 1 second frames were collected through the sample elution peak and processed using CHROMIXS that included the identification and subtraction of an appropriate solvent-blank.

Similar to Aedes aegypti 34 kDa salivary secreted protein 34k-2 (LIPS-2)
Mol. type   Protein
Organism   Aedes albopictus
Olig. state   Monomer
Mon. MW   34.6 kDa
 
UniProt   Q5MIU2 (21-322)
Sequence   FASTA