Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4778
Number of amino acids:628
Molecular Weight:69812.31 Da
Theoretical pI:5.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)406.37%
Cysteine CYS (C)355.57%
Glutamic Acid GLU (E)416.53%
Aspartic Acid ASP (D)477.48%
Glycine GLY (G)477.48%
Phynylalanine PHE (F)223.5%
Isoleucine ILE (I)264.14%
Histidine HIS (H)91.43%
Lysine LYS (K)518.12%
Methionine MET (M)142.23%
Leucine LEU (L)447.01%
Asparagine ASN (N)284.46%
Glutamine GLN (Q)213.34%
Proline PRO (P)314.94%
Serine SER (S)457.17%
Arginine ARG (R)223.5%
Threonine THR (T)274.3%
Tryptophan TRP (W)132.07%
Valine VAL (V)447.01%
Tyrosine TYR (Y)213.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3059
HydrogenH4755
NitrogenN825
OxygenO947
SulphurS49

FormulaC3059H4755N825O947S49
Total Number of Atoms:9635


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):88
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    104915
Absorption 0.1% (=1 g/l)    1.503,   assuming all pairs of CYS residues form cystines

Ext. coefficient    102790
Absorption 0.1% (=1 g/l)    1.472,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.07, 24.04, 22.13]

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:70.1593
Grand average of hydropathicity (GRAVY):-0.40