Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4777
Number of amino acids:628
Molecular Weight:69744.11 Da
Theoretical pI:5.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)416.53%
Cysteine CYS (C)355.57%
Glutamic Acid GLU (E)416.53%
Aspartic Acid ASP (D)487.64%
Glycine GLY (G)477.48%
Phynylalanine PHE (F)213.34%
Isoleucine ILE (I)264.14%
Histidine HIS (H)91.43%
Lysine LYS (K)507.96%
Methionine MET (M)121.91%
Leucine LEU (L)477.48%
Asparagine ASN (N)284.46%
Glutamine GLN (Q)223.5%
Proline PRO (P)314.94%
Serine SER (S)447.01%
Arginine ARG (R)223.5%
Threonine THR (T)284.46%
Tryptophan TRP (W)132.07%
Valine VAL (V)426.69%
Tyrosine TYR (Y)213.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3055
HydrogenH4751
NitrogenN825
OxygenO950
SulphurS47

FormulaC3055H4751N825O950S47
Total Number of Atoms:9628


Total number of positively charged residues (ARG + LYS):72
Total number of negatively charged residues (ASP + GLU):89
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    104915
Absorption 0.1% (=1 g/l)    1.504,   assuming all pairs of CYS residues form cystines

Ext. coefficient    102790
Absorption 0.1% (=1 g/l)    1.474,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.07, 23.89, 22.45]

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:71.258
Grand average of hydropathicity (GRAVY):-0.41