Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4468
Number of amino acids:102
Molecular Weight:10576.28 Da
Theoretical pI:5.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.82%
Cysteine CYS (C)98.82%
Glutamic Acid GLU (E)21.96%
Aspartic Acid ASP (D)10.98%
Glycine GLY (G)21.96%
Phynylalanine PHE (F)21.96%
Isoleucine ILE (I)76.86%
Histidine HIS (H)10.98%
Lysine LYS (K)10.98%
Methionine MET (M)32.94%
Leucine LEU (L)1211.76%
Asparagine ASN (N)65.88%
Glutamine GLN (Q)87.84%
Proline PRO (P)76.86%
Serine SER (S)1918.63%
Arginine ARG (R)10.98%
Threonine THR (T)54.9%
Tryptophan TRP (W)00%
Valine VAL (V)76.86%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC448
HydrogenH744
NitrogenN122
OxygenO147
SulphurS12

FormulaC448H744N122O147S12
Total Number of Atoms:1473


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):3
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    500
Absorption 0.1% (=1 g/l)    0.047,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.020

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 88.71

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 33.33, 25.49]

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:101.373
Grand average of hydropathicity (GRAVY):0.54