Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4773
Number of amino acids:114
Molecular Weight:12597.62 Da
Theoretical pI:5.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)87.02%
Cysteine CYS (C)1412.28%
Glutamic Acid GLU (E)54.39%
Aspartic Acid ASP (D)87.02%
Glycine GLY (G)21.75%
Phynylalanine PHE (F)65.26%
Isoleucine ILE (I)32.63%
Histidine HIS (H)32.63%
Lysine LYS (K)87.02%
Methionine MET (M)54.39%
Leucine LEU (L)87.02%
Asparagine ASN (N)65.26%
Glutamine GLN (Q)32.63%
Proline PRO (P)43.51%
Serine SER (S)108.77%
Arginine ARG (R)21.75%
Threonine THR (T)76.14%
Tryptophan TRP (W)00%
Valine VAL (V)108.77%
Tyrosine TYR (Y)21.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC535
HydrogenH849
NitrogenN143
OxygenO169
SulphurS19

FormulaC535H849N143O169S19
Total Number of Atoms:1715


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):13
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    3855
Absorption 0.1% (=1 g/l)    0.306,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.237,   assuming all CYS residues are reduced
Aromaticity:0.070

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.07

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.44, 19.30, 22.81]

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:70.0877
Grand average of hydropathicity (GRAVY):0.11