Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4635
Number of amino acids:640
Molecular Weight:70730.21 Da
Theoretical pI:8.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)304.69%
Cysteine CYS (C)284.38%
Glutamic Acid GLU (E)304.69%
Aspartic Acid ASP (D)345.31%
Glycine GLY (G)568.75%
Phynylalanine PHE (F)264.06%
Isoleucine ILE (I)345.31%
Histidine HIS (H)111.72%
Lysine LYS (K)396.09%
Methionine MET (M)91.41%
Leucine LEU (L)6910.78%
Asparagine ASN (N)385.94%
Glutamine GLN (Q)203.13%
Proline PRO (P)253.91%
Serine SER (S)497.66%
Arginine ARG (R)325%
Threonine THR (T)345.31%
Tryptophan TRP (W)81.25%
Valine VAL (V)487.5%
Tyrosine TYR (Y)203.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3129
HydrogenH4955
NitrogenN863
OxygenO930
SulphurS37

FormulaC3129H4955N863O930S37
Total Number of Atoms:9914


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75550
Absorption 0.1% (=1 g/l)    1.068,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73800
Absorption 0.1% (=1 g/l)    1.043,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.88

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.03, 26.25, 21.56]

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:89.2029
Grand average of hydropathicity (GRAVY):-0.14