Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4421
Number of amino acids:727
Molecular Weight:81998.87 Da
Theoretical pI:8.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)435.91%
Cysteine CYS (C)111.51%
Glutamic Acid GLU (E)364.95%
Aspartic Acid ASP (D)314.26%
Glycine GLY (G)648.8%
Phynylalanine PHE (F)364.95%
Isoleucine ILE (I)456.19%
Histidine HIS (H)172.34%
Lysine LYS (K)527.15%
Methionine MET (M)212.89%
Leucine LEU (L)567.7%
Asparagine ASN (N)354.81%
Glutamine GLN (Q)162.2%
Proline PRO (P)405.5%
Serine SER (S)557.57%
Arginine ARG (R)233.16%
Threonine THR (T)466.33%
Tryptophan TRP (W)263.58%
Valine VAL (V)385.23%
Tyrosine TYR (Y)364.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3750
HydrogenH5655
NitrogenN959
OxygenO1050
SulphurS32

FormulaC3750H5655N959O1050S32
Total Number of Atoms:11446


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    197265
Absorption 0.1% (=1 g/l)    2.406,   assuming all pairs of CYS residues form cystines

Ext. coefficient    196640
Absorption 0.1% (=1 g/l)    2.398,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.60, 26.68, 21.46]

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:75.2545
Grand average of hydropathicity (GRAVY):-0.26