Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3877
Number of amino acids:92
Molecular Weight:8966.22 Da
Theoretical pI:9.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1718.48%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)22.17%
Glycine GLY (G)1010.87%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)55.43%
Histidine HIS (H)00%
Lysine LYS (K)44.35%
Methionine MET (M)00%
Leucine LEU (L)44.35%
Asparagine ASN (N)55.43%
Glutamine GLN (Q)11.09%
Proline PRO (P)44.35%
Serine SER (S)1314.13%
Arginine ARG (R)66.52%
Threonine THR (T)55.43%
Tryptophan TRP (W)00%
Valine VAL (V)66.52%
Tyrosine TYR (Y)22.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC369
HydrogenH624
NitrogenN120
OxygenO123
SulphurS8

FormulaC369H624N120O123S8
Total Number of Atoms:1244


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
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)    0.388,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.332,   assuming all CYS residues are reduced
Aromaticity:0.022

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.48, 34.78, 22.83]

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:75.5435
Grand average of hydropathicity (GRAVY):0.17