Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4617
Number of amino acids:316
Molecular Weight:33517.8 Da
Theoretical pI:8.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.13%
Cysteine CYS (C)92.85%
Glutamic Acid GLU (E)61.9%
Aspartic Acid ASP (D)175.38%
Glycine GLY (G)237.28%
Phynylalanine PHE (F)175.38%
Isoleucine ILE (I)154.75%
Histidine HIS (H)41.27%
Lysine LYS (K)144.43%
Methionine MET (M)51.58%
Leucine LEU (L)309.49%
Asparagine ASN (N)268.23%
Glutamine GLN (Q)103.16%
Proline PRO (P)113.48%
Serine SER (S)3511.08%
Arginine ARG (R)113.48%
Threonine THR (T)268.23%
Tryptophan TRP (W)10.32%
Valine VAL (V)185.7%
Tyrosine TYR (Y)61.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1462
HydrogenH2320
NitrogenN408
OxygenO466
SulphurS14

FormulaC1462H2320N408O466S14
Total Number of Atoms:4670


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.446,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.431,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.53, 30.06, 23.10]

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:82.1836
Grand average of hydropathicity (GRAVY):-0.03