Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3945
Number of amino acids:92
Molecular Weight:9847.49 Da
Theoretical pI:8.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.78%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)44.35%
Aspartic Acid ASP (D)33.26%
Glycine GLY (G)44.35%
Phynylalanine PHE (F)22.17%
Isoleucine ILE (I)55.43%
Histidine HIS (H)11.09%
Lysine LYS (K)77.61%
Methionine MET (M)11.09%
Leucine LEU (L)66.52%
Asparagine ASN (N)66.52%
Glutamine GLN (Q)11.09%
Proline PRO (P)66.52%
Serine SER (S)66.52%
Arginine ARG (R)44.35%
Threonine THR (T)88.7%
Tryptophan TRP (W)00%
Valine VAL (V)99.78%
Tyrosine TYR (Y)22.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC424
HydrogenH700
NitrogenN120
OxygenO130
SulphurS9

FormulaC424H700N120O130S9
Total Number of Atoms:1383


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3480
Absorption 0.1% (=1 g/l)    0.353,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.303,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.09, 23.91, 21.74]

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:84.7826
Grand average of hydropathicity (GRAVY):0.06