Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5168
Number of amino acids:838
Molecular Weight:89173.42 Da
Theoretical pI:5.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)293.46%
Cysteine CYS (C)40.48%
Glutamic Acid GLU (E)161.91%
Aspartic Acid ASP (D)40.48%
Glycine GLY (G)16419.57%
Phynylalanine PHE (F)30.36%
Isoleucine ILE (I)40.48%
Histidine HIS (H)40.48%
Lysine LYS (K)70.84%
Methionine MET (M)30.36%
Leucine LEU (L)414.89%
Asparagine ASN (N)00%
Glutamine GLN (Q)29234.84%
Proline PRO (P)10712.77%
Serine SER (S)495.85%
Arginine ARG (R)101.19%
Threonine THR (T)252.98%
Tryptophan TRP (W)91.07%
Valine VAL (V)212.51%
Tyrosine TYR (Y)465.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3821
HydrogenH5770
NitrogenN1184
OxygenO1291
SulphurS7

FormulaC3821H5770N1184O1291S7
Total Number of Atoms:12073


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    118290
Absorption 0.1% (=1 g/l)    1.327,   assuming all pairs of CYS residues form cystines

Ext. coefficient    118040
Absorption 0.1% (=1 g/l)    1.324,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 85.39

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.80, 38.19, 10.62]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:31.6706
Grand average of hydropathicity (GRAVY):-1.43