Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5730
Number of amino acids:122
Molecular Weight:11952.77 Da
Theoretical pI:9.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2520.49%
Cysteine CYS (C)86.56%
Glutamic Acid GLU (E)10.82%
Aspartic Acid ASP (D)21.64%
Glycine GLY (G)119.02%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)64.92%
Histidine HIS (H)00%
Lysine LYS (K)43.28%
Methionine MET (M)21.64%
Leucine LEU (L)64.92%
Asparagine ASN (N)43.28%
Glutamine GLN (Q)21.64%
Proline PRO (P)43.28%
Serine SER (S)1713.93%
Arginine ARG (R)97.38%
Threonine THR (T)86.56%
Tryptophan TRP (W)00%
Valine VAL (V)119.02%
Tyrosine TYR (Y)21.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC496
HydrogenH849
NitrogenN159
OxygenO162
SulphurS10

FormulaC496H849N159O162S10
Total Number of Atoms:1676


Total number of positively charged residues (ARG + LYS):13
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    3480
Absorption 0.1% (=1 g/l)    0.291,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.249,   assuming all CYS residues are reduced
Aromaticity:0.016

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.49, 29.51, 27.87]

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:85
Grand average of hydropathicity (GRAVY):0.37