Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4125
Number of amino acids:647
Molecular Weight:70405.68 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)416.34%
Cysteine CYS (C)71.08%
Glutamic Acid GLU (E)446.8%
Aspartic Acid ASP (D)314.79%
Glycine GLY (G)558.5%
Phynylalanine PHE (F)233.55%
Isoleucine ILE (I)243.71%
Histidine HIS (H)101.55%
Lysine LYS (K)335.1%
Methionine MET (M)152.32%
Leucine LEU (L)8713.45%
Asparagine ASN (N)324.95%
Glutamine GLN (Q)132.01%
Proline PRO (P)274.17%
Serine SER (S)6510.05%
Arginine ARG (R)375.72%
Threonine THR (T)294.48%
Tryptophan TRP (W)50.77%
Valine VAL (V)578.81%
Tyrosine TYR (Y)121.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3113
HydrogenH5027
NitrogenN861
OxygenO949
SulphurS22

FormulaC3113H5027N861O949S22
Total Number of Atoms:9972


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):75
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45755
Absorption 0.1% (=1 g/l)    0.650,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45380
Absorption 0.1% (=1 g/l)    0.645,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.15, 27.67, 28.90]

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:98.7945
Grand average of hydropathicity (GRAVY):-0.07